Issue: 19391201

Friday, December 1, 1939
December 1939
6
True
135
Wednesday, December 31, 2014

Articles
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POPULAR SCIENCE MONTHLY
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PopularScience_19391201_0135_006_0001.xml
advertisement
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THE B. F. GOODRICH CO.: Goodrich GLASSTEX Battery
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THE B. F. GOODRICH CO.
Goodrich GLASSTEX Battery
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PopularScience_19391201_0135_006_0002.xml
advertisement
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1
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Advertisement: 1940 Plymouth
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1940 Plymouth
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PopularScience_19391201_0135_006_0003.xml
masthead
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2
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POPULAR SCIENCE MONTHLY
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PopularScience_19391201_0135_006_0004.xml
tableOfContents
2
2,4,6,8
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CONTENTS FOR DECEMBER 1939
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PopularScience_19391201_0135_006_0005.xml
advertisement
3
3
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Advertisements
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BRIAR HILL CORP.
BULLDOG— Medium No. 50
BRIAR HILL CORP.
POT-Medium No. 24
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PopularScience_19391201_0135_006_0006.xml
advertisement
5
5
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OLDSMOBILE: HYDRA-MATIC DRIVE
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OLDSMOBILE
HYDRA-MATIC DRIVE
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PopularScience_19391201_0135_006_0007.xml
advertisement
6
6
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Advertisement
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PopularScience_19391201_0135_006_0008.xml
advertisement
7
7
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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PopularScience_19391201_0135_006_0009.xml
advertisement
8
8
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Advertisements
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Mobil Specialties
MOBIL HANDY OIL
Mobil Specialties
MOBIL UPPERLUBE
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PopularScience_19391201_0135_006_0010.xml
article
8
8
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NOW IS THE TIME TO Start a Home Workshop
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How are you spending your spare time during the winter months? One of the best ways is in your workshop making projects for the home and to give to your family and friends. For the benefit of those who know little or nothing about a workshop, POPULAR SCIENCE MONTHLY is presenting a series of articles on the subject.
PopularScience_19391201_0135_006_0011.xml
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9
9
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LASALLE EXTENSION UNIVERSITY
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LASALLE EXTENSION UNIVERSITY
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PopularScience_19391201_0135_006_0012.xml
advertisement
10
10,11
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National Radio Institute
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National Radio Institute
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PopularScience_19391201_0135_006_0013.xml
article
12
12,14,16
Our Readers Say
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Our Readers Say
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WELL, I took it in stride when “glass bricks” for building purposes first put a literal meaning in the old adage about “people who live in glass houses.” Now I hear that cars may be made with transparent-plastic tops. My heart goes out in pity for the modern youth and gal when cars no longer afford privacy consistent with the needs of those moments of “engine trouble.”
PopularScience_19391201_0135_006_0014.xml
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13
13
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American School
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American School
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PopularScience_19391201_0135_006_0015.xml
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15
15
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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PopularScience_19391201_0135_006_0016.xml
advertisement
17
17
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The A. C. Gilbert Company: All-Electric Erector
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The A. C. Gilbert Company
All-Electric Erector
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PopularScience_19391201_0135_006_0017.xml
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18
18,19
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CLARENCE A. O’BRIEN
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CLARENCE A. O’BRIEN
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PopularScience_19391201_0135_006_0018.xml
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20
20
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Advertisements
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PopularScience_19391201_0135_006_0019.xml
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21
21
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FEDERAL SCHOOLS INC.
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FEDERAL SCHOOLS INC.
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PopularScience_19391201_0135_006_0020.xml
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22
22
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Advertisements
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PopularScience_19391201_0135_006_0021.xml
advertisement
23
23
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Advertisements
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PopularScience_19391201_0135_006_0022.xml
article
24
24,26,28
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With the Inventors
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AUTOMATIC stop lights for bicycles are made possible by an invention worked out by Thomas J. and James M. Murray, of Chicago, Ill. A battery-operated stop light mounted on the rear fender of a bicycle is controlled by a switch installed on the bottom fork of the vehicle frame, close to the lower run of the driving chain.
PopularScience_19391201_0135_006_0023.xml
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25
25
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VICTOR J. EVANS & Co.
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VICTOR J. EVANS & Co.
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PopularScience_19391201_0135_006_0024.xml
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26
26
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D. Van Nostrand Co., Inc.: MATHEMATICS FOR SELF-STUDY
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D. Van Nostrand Co., Inc.
MATHEMATICS FOR SELF-STUDY
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PopularScience_19391201_0135_006_0025.xml
advertisement
27
27
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L. L. Adcox Trade School
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L. L. Adcox Trade School
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PopularScience_19391201_0135_006_0026.xml
advertisement
27
27
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PIONEER NATIONAL CASUALTY CO.
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PIONEER NATIONAL CASUALTY CO.
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PopularScience_19391201_0135_006_0027.xml
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27
27
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THEO. AUDEL & CO.
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THEO. AUDEL & CO.
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PopularScience_19391201_0135_006_0028.xml
advertisement
28
28
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American School
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American School
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PopularScience_19391201_0135_006_0029.xml
advertisement
29
29
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Advertisements
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PopularScience_19391201_0135_006_0030.xml
advertisement
30
30
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Advertisements
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PopularScience_19391201_0135_006_0031.xml
advertisement
31
31
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Advertisements
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PopularScience_19391201_0135_006_0032.xml
article
32
32
New Ideas FOR HOME OWNERS
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New Ideas FOR HOME OWNERS
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SHORT CIRCUITS resulting from dust, dirt, or tiny bits of metal getting down between the threaded metal end of a light bulb and the socket into which it is screwed, are prevented by a small collar made of molded rubber. The collar is fitted over the open end of the socket to form a preventive seal against the entrance of particles that might cause a “short.”
PopularScience_19391201_0135_006_0033.xml
article
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32
HELPS FOR HOME OWNERS
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Stainless-Steel “Lumber“ for Building
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THIN sheets of stainless steel bonded to an inert mineral backing form a new type of strong, rigid paneling for use in building construction. Fireproof and weather-resistant, the novel material reflects about ninety percent of all the heat rays striking its polished surface, is practically free from warping, and has the quality of absorbing sound.
PopularScience_19391201_0135_006_0034.xml
advertisement
33
33
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The Lionel Corporation: Push-Button Railroading
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The Lionel Corporation
Push-Button Railroading
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PopularScience_19391201_0135_006_0035.xml
advertisement
34
34
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Ironized Yeast Co., Inc.: Ironized Yeast tablets
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Ironized Yeast Co., Inc.
Ironized Yeast tablets
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PopularScience_19391201_0135_006_0036.xml
article
34
34
HELPS FOR HOME OWNERS
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Solvent Loosens Finish For Easy Removal
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SYNTHETIC-RESIN finishes, as well as paint, varnish, enamel, or shellac, are easily removed from a surface with a solvent just marketed. Said to be harmless to hands, clothing, or the surface treated, the substance is brushed on and allowed to set.
PopularScience_19391201_0135_006_0037.xml
article
34
34
HELPS FOR HOME OWNERS
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Rug Cleaner Retards Wear
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WHEN dissolved in water, a new chemical cleaner forms foamy suds, which are applied to a rug, rubbed in lightly, and allowed to evaporate. By this process, it is said, dirt is removed and a chemical coating is formed around rug threads, preventing wear.
PopularScience_19391201_0135_006_0038.xml
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35
35
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NATIONAL CARBON COMPANY, INC.: Eveready
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NATIONAL CARBON COMPANY, INC.
Eveready
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PopularScience_19391201_0135_006_0039.xml
advertisement
36
36
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Advertisement
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PopularScience_19391201_0135_006_0040.xml
article
36
36
HELPS FOR HOME OWNERS
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Questions FROM HOME OWNERS
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Q.—WE ARE remodeling part of our cellar into a recreation room. Can you tell me if there is any preparation which would be less expensive than stain, with which we could darken the joists and other wooden ceiling members to a color approximating walnut stain?
PopularScience_19391201_0135_006_0041.xml
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37
37
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Johnson Smith & Co.: LIGHTED CIGARET DISPENSER CASE
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Johnson Smith & Co.
LIGHTED CIGARET DISPENSER CASE
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PopularScience_19391201_0135_006_0042.xml
advertisement
37
37
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Aero Industries Technical Institute
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Aero Industries Technical Institute
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PopularScience_19391201_0135_006_0043.xml
advertisement
38
38
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Advertisements
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PopularScience_19391201_0135_006_0044.xml
advertisement
39
39
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Advertisements
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PopularScience_19391201_0135_006_0045.xml
advertisement
40
40
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Advertisement: POPULAR SCIENCE MONTHLY
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POPULAR SCIENCE MONTHLY
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PopularScience_19391201_0135_006_0046.xml
advertisement
41
41
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Advertisements
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PopularScience_19391201_0135_006_0047.xml
advertisement
42
42
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Advertisements
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PopularScience_19391201_0135_006_0048.xml
advertisement
43
43
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Advertisements
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PopularScience_19391201_0135_006_0049.xml
advertisement
44
44
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Advertisements
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PopularScience_19391201_0135_006_0050.xml
advertisement
45
45
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Advertisements
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PopularScience_19391201_0135_006_0051.xml
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46
46,47
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Advertisement: POPULAR SCIENCE
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POPULAR SCIENCE
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PopularScience_19391201_0135_006_0052.xml
advertisement
48
48
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Advertisements
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PopularScience_19391201_0135_006_0053.xml
advertisement
49
49
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Advertisements
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PopularScience_19391201_0135_006_0054.xml
advertisement
50
50,51,52,53,54,55,56,57
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Classified Section
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PopularScience_19391201_0135_006_0055.xml
advertisement
57
57
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Advertisements
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PopularScience_19391201_0135_006_0056.xml
advertisement
58
58
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R. J. Reynolds Tobacco Co.: Prince Albert
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R. J. Reynolds Tobacco Co.
Prince Albert
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PopularScience_19391201_0135_006_0057.xml
article
59
59,60,61,62,63,241
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Forty Years of the Automobile
WITHIN A GENERATION, AN INFANT INDUSTRY HAS GROWN UP TO GIANT SIZE, PROFOUNDLY INFLUENCING OUR MANNER OF LIVING
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E. W. MURTFELDT
STREAMING up the steps of the Grand Central Palace in New York City a few weeks ago, eager crowds milled into the spacious exhibition halls where sleek, polished 1940-model automobiles gleamed in the glare of a thousand lights. Salesmen eagerly talked about 100-horsepower engines, dashboard styling, and the sweeping flow of fenders.
PopularScience_19391201_0135_006_0058.xml
article
64
64
NEW INVENTIONS
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Stoker Pipe for Smokers Saves Matches, Tobacco
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BY ADDING a perforated metal disk, attached to an elevating screw, to the bowl of an ordinary smoking pipe, Harold T. Blum, of Millersburg, Ohio, has devised a pipe operating on a new principle. It is filled and lighted in the ordinary way. Then, from time to time, the elevating screw is given a turn, pushing the tobacco upward.
PopularScience_19391201_0135_006_0059.xml
article
64
64
UNUSUAL FACTS AND IDEAS
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"Electrical Ears" Test Machines
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ELECTRICAL ears, tuned in to catch faint sounds that indicate flaws in finished products, are now being used in American factories. Deaf to all sounds except the particular squeak or rattle they are set to pick up, such “industrial noise analyzers” can be used to warn assembly-line inspectors of defective motors or similar machines.
PopularScience_19391201_0135_006_0060.xml
article
64
64
NEW INVENTIONS
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Protractor Marks Lines for Welding Joints
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ELIMINATING the necessity of making complicated templates, a new protractor simplifies the work of marking pipes for cutting in preparation for welding joints. To determine the angle at which the cut is to be made, the user sets an indicator on a 180-degree scale.
PopularScience_19391201_0135_006_0061.xml
article
65
65
UNUSUAL FACTS AND IDEAS
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How Radio Gathers the War News
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TO PROVIDE radio listeners with the most efficient coverage of war news, from all fronts, the Columbia Broadcasting System is now operating a specially designed studio in New York City that serves as a nerve center for news. From the middle of the studio, announcers at the microphone table can look through a plate-glass window in one wall into the office of the director of the network’s news service; through a second wall window into the news room where a staff is receiving and editing late news bulletins; through a third to the master control booth; and through a fourth to a soundproof listening room where a corps of linguists listen to and interpret incoming short-wave programs from stations all over the world.
PopularScience_19391201_0135_006_0062.xml
article
66
66
NEW INVENTIONS
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It Types Out Tunes Instead of Words
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IF YOU can operate a typewriter, it should be the easiest thing in the world to play a novel musical instrument recently invented by Alexander Rose, a court reporter in the Borough of the Bronx, New York City. Resembling a small portable typewriter in appearance, the novel instrument is played by typing out words on keys, following a written score in the form of words inscribed on a sheet of paper, thus eliminating the necessity of learning to read musical notation.
PopularScience_19391201_0135_006_0063.xml
article
66
66
UNUSUAL FACTS AND IDEAS
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Skull Throws New Light on Ancient Man
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CALLED the most perfectly preserved specimen of its kind in the world, the skull of a Neanderthal man, member of a race that inhabited the earth many centuries ago, was discovered recently on an altar in a cave at Monte Circeo, an Italian seaside resort some fifty miles from Rome.
PopularScience_19391201_0135_006_0064.xml
article
67
67
UNUSUAL FACTS AND IDEAS
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Auto-Wheel Fence for Used-Car Lot
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OLD wire wheels, salvaged from junked automobiles, are welded together to form a novel fence around a used-car lot in San Jose, Calif., which also boasts a gateway whose hinge posts consist of upright automobile drive shafts, connected at their tops by a muffler and exhaust pipe.
PopularScience_19391201_0135_006_0065.xml
article
67
67
NEW INVENTIONS
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Shoulder Shrug "Laces" Corset of New Design
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A SHRUG of the shoulders is all that is required to tighten a corset fitted with a novel automatic slide fastener now available. Raising the shoulders exerts a tug on the corset shoulder straps which in turn pull the slide fastener upward to close it.
PopularScience_19391201_0135_006_0066.xml
article
67
67
NEW INVENTIONS
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New Rotary Bins Save Time, Space
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MOUNTED one above the other on a central vertical shaft, shelves containing compartments of various sizes for tools and machine parts can be revolved to make their contents quickly available. A typical example of the advantage of the rotating parts shelves over stationary types, the manufacturer claims, occurred in a Detroit, Mich., automobile plant where the device doubled the speed of serving parts to men.
PopularScience_19391201_0135_006_0067.xml
article
68
68
HEALTH AND HYGIENE
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Beauty "Gun" Fires Ozone To Tone Up the Skin
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BOMBARDING the skin and scalp with a vapor shot from a gun is a new type of beauty treatment that is said to cleanse and tone up the skin. The vapor, consisting of steam and active oxygen, or ozone, produced by an electric arc, is sprayed into the hair to treat the scalp, or over the skin, as shown in the illustrations below and at the right.
PopularScience_19391201_0135_006_0068.xml
article
68
68
UNUSUAL FACTS AND IDEAS
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Broken Glass Is Good for Chicks
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BROKEN GLASS, which keeps its cutting edges many times longer than pebbles, is by far the most effective form of grit a chicken can have in its gizzard for grinding up and deriving most nourishment from its food, according to Dr. George S. Oliver, Los Angeles, Calif., agricultural scientist.
PopularScience_19391201_0135_006_0069.xml
article
68
68
UNUSUAL FACTS AND IDEAS
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Fly on Egg Is Tape Measure
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ALTHOUGH at first glance it appears to be only a house fly perched on a hen’s egg, the novelty pictured at the left is actually a handy tape measure. Pulling out the artificial leather fly unreels the tape measure from a drum inside the painted steel egg.
PopularScience_19391201_0135_006_0070.xml
article
69
69
MODELS
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Realistic Model Railroad Crane
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BUILT to a scale of one inch to the foot, a remarkable working model of a railroad wrecking crane designed and constructed by Aaron F. Scoblic, of Milwaukee, Wis., will lift more than double its own weight of 155 pounds. Powered by a quarter - horsepower electric motor, the crane is operated from the side of the revolving cab by means of four control levers, each of which has a forward, neutral, and reverse position.
PopularScience_19391201_0135_006_0071.xml
article
69
69
UNUSUAL FACTS AND IDEAS
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Railroad Cattle Crossings Get Telephones
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FARMERS drive their cattle over railroad crossings with complete safety by using a novel system recently established. Using a telephone installed near the crossing gate, the farmer calls the railroad signal man and ascertains if near-by track sections are free of approaching trains.
PopularScience_19391201_0135_006_0072.xml
article
69
69
NEW INVENTIONS
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New Electric Hand Tool
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OPERATING with a reciprocating movement, a new workshop power tool will chip, saw, file, burr, and hone, performing many jobs such as die sinking, and pattern, tool, and plasticmold making. Powered by a 110-volt universal motor, the tool weighs only one pound.
PopularScience_19391201_0135_006_0073.xml
article
70
70,71
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"Sweet Potato" Factory
REAPS PROFIT FOR HIGH-SCHOOL BOYS
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MANUFACTURING a patented product in a basement workshop after school hours, three Minneapolis, Minn., boys, Stewart Sumner, Dick Fjellman, and Oliver Engebretson, have made a flying start toward business success. Their product is a wooden variety of the ocarina, the familiar musical “sweet potato” usually made of clay.
PopularScience_19391201_0135_006_0074.xml
article
72
72
UNUSUAL FACTS AND IDEAS
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Dial Connections Speed Up Telegrams
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DIALS, similar to those used on metropolitan telephones, are now employed for speeding up the transmission of telegraph messages. Operators in New York City, Bridgeport, Conn., and Washington, D. C., need only to twirl a dial to connect their offices by direct circuit with the main telegraph offices at Boston, Mass., Chicago, Ill., Cleveland, Ohio, Baltimore, Md., and other leading cities.
PopularScience_19391201_0135_006_0075.xml
article
72
72
NEW INVENTIONS
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Quick Changes Possible with New Drill Chuck
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[no value]
SPEEDY changing of drills is made possible by a new chuck recently introduced by a Chicago, Ill., tool manufacturer. According to the maker, the chuck permits drills to be changed safely without stopping the machine, a slight upward movement of a knurled sleeve releasing the drill.
PopularScience_19391201_0135_006_0076.xml
article
72
72
PHOTOGRAPHY
[no value]
Post Card Forms Frame for Your Own Snapshot
[no value]
[no value]
[no value]
[no value]
POST CARDS with compartments into which you can slip snapshots, are now available. Ends on the card fold back over the picture to protect it. When the card reaches its destination, these ends can be bent to turn the card into an easel frame.
PopularScience_19391201_0135_006_0077.xml
article
73
73
AUTOMOBILES
[no value]
Skyscraper Houses Six-Story Garage
[no value]
[no value]
[no value]
[no value]
EXTENDING three stories below and three stories above the street floor of a giant skyscraper, an 800-car, air-conditioned garage at Rockefeller Center effectively solves the car-parking problems for visitors to mid-town New York. Spiral ramps allow the cars to be distributed quickly to the different levels, while powerful fans continuously suck away air contaminated by the car exhausts.
PopularScience_19391201_0135_006_0078.xml
article
74
74
PHOTOGRAPHY
[no value]
Camera Makes 120,000 Shots in a Second
[no value]
[no value]
[no value]
[no value]
WHAT is the speediest camera in the world ? According to General Electric experts, the title belongs to a new camera developed by W. K. Rankin, Philadelphia, Pa., engineer, that shoots pictures at the rate of 120,000 a second. Designed to photograph electric arcs so that their behavior can be studied in circuit breakers and other electrical apparatus, the camera is cylindrical in shape and is surrounded by a steel case large enough for a man to work in, thereby providing its own darkroom.
PopularScience_19391201_0135_006_0079.xml
article
75
75
UNUSUAL FACTS AND IDEAS
[no value]
Chart Keeps Murder Record
[no value]
[no value]
[no value]
[no value]
RESEMBLING an enlarged chart of a family tree, the novel panel shown in the background, above, has been helping Philadelphia detectives and prosecutors keep track of a sensational series of murder trials. The first line lists twenty victims allegedly poisoned for profit by an “arsenic ring.”
PopularScience_19391201_0135_006_0080.xml
article
75
75
NEW INVENTIONS
[no value]
Funnel Fits Upright on End of Barrel
[no value]
[no value]
[no value]
[no value]
THERE'S no need to up-end heavy barrels, when a new type of funnel is used to replenish their contents. With its spout inserted in the bunghole, the funnel stands securely in place. Built-in brackets rest against the end of the barrel to support it, as shown in the illustration below.
PopularScience_19391201_0135_006_0081.xml
article
75
75
UNUSUAL FACTS AND IDEAS
[no value]
Beautifies “Bingo” Beans as Business
[no value]
[no value]
[no value]
[no value]
BY PAINTING Lima beans in fancy colors, Stanley Nowicki, of Grand Rapids, Mich., has found a new and profitable occupation. His customers are establishments that conduct games of “Beano,” a pastime resembling “Bingo” or lotto, in which the dried beans are used as markers on numbered cards.
PopularScience_19391201_0135_006_0082.xml
article
76
76,77,238
[no value]
[no value]
How Well Do You Get Along with People?
CHECK YOUR PERSONALITY WITH THIS NOVEL TEST
[no value]
[no value]
[no value]
RECENTLY, three California educators announced the perfection of a scientific test which analyzes your personality and ability to get along with the world just as the familiar intelligence test reveals the quality of your mind. Three years of research and experiment went into their psychological questionnaire. The scientists, Drs. Ernest W. Tiegs and Louis P. Thorpe, of the University of Southern California, and Willis W. Clark, Director of Administrative Research for Los Angeles County schools, worked out an original list of 1,000 questions.
PopularScience_19391201_0135_006_0083.xml
article
78
78
NEW INVENTIONS
[no value]
New Tirelike Clutch Works by Inflation
[no value]
[no value]
[no value]
[no value]
RESEARCH at an Akron, Ohio, tire factory has resulted in the perfection of a radically new rubber clutch for Diesel and marine engines. Tirelike in shape and construction, the new clutch is operated by air pressure instead of the usual levers and springs.
PopularScience_19391201_0135_006_0084.xml
article
78
78
NEW INVENTIONS
[no value]
Clothespin Toymakers Come in Kit
[no value]
[no value]
[no value]
[no value]
COLORED clothespins, providing the ingenious youngster with material for making a wide variety of toys, are now being sold in compact kits, containing either sixty-five or 100 spring-type pins. The larger set also contains pulleys and wheels.
PopularScience_19391201_0135_006_0085.xml
article
79
79
UNUSUAL FACTS AND IDEAS
[no value]
Canned, Frozen Sunlight Shipped by Airplane
[no value]
[no value]
[no value]
[no value]
CANNED sunshine, absorbed by luminescent powder and flown from Florida with the powder frozen by liquid air to a temperature of 300 degrees below zero F., recently turned on lights in New York City. As the tube thawed out, the powder began to glow, releasing solar energy.
PopularScience_19391201_0135_006_0086.xml
article
79
79
[no value]
[no value]
Shells Serve as Models for Fast War Planes
[no value]
[no value]
[no value]
[no value]
PHOTOGRAPHING field-artillery shells in flight is a plan to be used by British aeronautical experts in designing faster fighting and bombing planes. The pictures, made by fixed-focus cameras on artillery proving grounds, are expected to reveal stresses built up by air resistance around plane noses of various shapes, better than tests made with stationary models in wind tunnels.
PopularScience_19391201_0135_006_0087.xml
article
79
79
UNUSUAL FACTS AND IDEAS
[no value]
Phonograph and Loudspeakers Explain Brewery to Visitors
[no value]
[no value]
[no value]
[no value]
WHEN a Milwaukee, Wis., brewing company found 5,000 persons a week were visiting its plant, it replaced lectures by regular guides, who had difficulty making themselves heard above the noise of the machines, with talks reproduced by phonograph records and amplifiers.
PopularScience_19391201_0135_006_0088.xml
article
80
80,81,236,238
[no value]
[no value]
Gas Turbines Promise New Era in Power
HOW SEARING FLAMES ARE HARNESSED TO TURN WHEELS
[no value]
[no value]
ALDEN P. ARMAGNAC
FIRST of its kind in the world, a “pocket powerhouse” of sensational new design will soon be ready for emergency service in a bombproof tunnel at Neuchâtel, Switzerland. Its machinery, already completed and tested successfully, includes neither towering steam boilers nor other bulky accessories.
PopularScience_19391201_0135_006_0089.xml
article
82
82,83
[no value]
[no value]
TELEVISION PLANES SPY ON ENEMY LINES
NEW SYSTEM OF MILITARY RECONNAISSANCE PRESENTS COMMANDERS WITH AN ACTUAL PICTURE OF CONDITIONS
[no value]
[no value]
[no value]
DRONING high above the earth, out of range of effective anti-aircraft fire, planes of England’s Royal Air Force may soon transmit “televised” images of enemy positions to field headquarters. Details of a British patent issued to the country’s leading television firm, just before the outbreak of hostilities, reveal how territory over which a plane is flying will automatically be scanned to secure information of strategic value.
PopularScience_19391201_0135_006_0090.xml
article
84
84,85,86,87
[no value]
[no value]
WAR IN THE AIR
HOW MODERN FLYERS FIGHT AIR BATTLES AS TEAMWORK REPLACES SINGLE COMBAT
[no value]
[no value]
[no value]
WITH aerial armadas battling in European skies, one of the most dramatic developments of the war has been the rise of the massed air attack. The picturesque ace of yesterday is largely a thing of the past. Single-handed battles aloft have been replaced by the clash of massed engines of destruction, compact, highly-trained groups which act as units.
PopularScience_19391201_0135_006_0091.xml
article
88
88
UNUSUAL FACTS AND IDEAS
[no value]
Orchard on One Tree
[no value]
[no value]
[no value]
[no value]
THIRTEEN years ago, in 1926, Major Frank A. Good, instructor in agriculture at the Provincial Normal School, Fredericton, N. B., set out to produce a “one-tree orchard” as a living monument to the apple-growing industry of the province. He determined to graft every apple grown in New Brunswick on the branches of one tree.
PopularScience_19391201_0135_006_0092.xml
article
89
89
UNUSUAL FACTS AND IDEAS
[no value]
Engineer Is Walking Microphone Boom
[no value]
[no value]
[no value]
[no value]
STRAPPED to the back of a television engineer, an overhead boom of lightweight metal tubing carries a microphone that picks up the sound accompaniment for British television programs. In the example illustrated above, the “walking mike” is bringing listeners an assorted selection of bleats from a sheep-shearing center.
PopularScience_19391201_0135_006_0093.xml
article
89
89
NEW INVENTIONS
[no value]
Megaphone Switch Fires Starting Gun
[no value]
[no value]
[no value]
[no value]
AN IMPROVED starting device for foot races, invented by a British scientist, has proved successful in recent tryouts. After giving the preliminary commands through his megaphone, the starter flips an electric switch attached to its handle.
PopularScience_19391201_0135_006_0094.xml
article
90
90
NEW INVENTIONS
[no value]
Lightweight Ear Guards Protect Factory Workers
[no value]
[no value]
[no value]
[no value]
EARS as well as eyes are protected from flying bits of metal, wood chips, dust, and other factory hazards endangering workmen, by the combined safety goggles and ear muffs shown in the illustration. Conventional safety goggles are fitted with the muffs, which weigh only two ounces and are held snugly in place by a springy steel head band.
PopularScience_19391201_0135_006_0095.xml
article
90
90
UNUSUAL FACTS AND IDEAS
[no value]
Fire Engine Makes a Transcontinental Trip
[no value]
[no value]
[no value]
[no value]
WHAT is believed to be the longest single run ever attempted by a vehicle of its type was made recently by the fire engine shown in the photograph above, which set out from New York City for a 4,000-mile tour of the United States from coast to coast.
PopularScience_19391201_0135_006_0096.xml
article
90
90
NEW INVENTIONS
[no value]
New Loader Speeds Rail-Truck Service
[no value]
[no value]
[no value]
[no value]
TO SPEED UP freight service, a new system employs automatic loading mechanisms that can transfer loaded, half-carload freight containers between a special motor truck and a railroad flat car, within ninety seconds. When a freight train arrives at its destination, a truck is brought alongside a flat car, a push button is pressed, and a twenty-ton container is automatically transferred to the truck for door delivery.
PopularScience_19391201_0135_006_0097.xml
article
91
91
NEW INVENTIONS
[no value]
Mother Invents a Walking Doll
[no value]
[no value]
[no value]
[no value]
"IF MY doll could only walk, Mother, she would be almost alive.” So Mrs. Edel Torngren, of Grand Rapids, Mich., set out to make her daughter’s wish come true. She succeeded so well that her invention of a “walking doll,” on which patent rights have been granted her, may find the eye of a toy manufacturer and make her rich.
PopularScience_19391201_0135_006_0098.xml
article
92
92
UNUSUAL FACTS AND IDEAS
[no value]
Grocer Builds Toy Village of Orange Crates
[no value]
[no value]
[no value]
[no value]
H. S. HOLSHUE, of Copley, Ohio, never lets the fact that he has been crippled since boyhood interfere with either business or pleasure. He has built up one of the most complete grocery stores in the state, and during his spare time he maneuvers around in his wheel chair adding new buildings to the seventy or more that comprise his remarkable midget village, made entirely from empty orange crates, apple boxes, and other food containers.
PopularScience_19391201_0135_006_0099.xml
article
92
92
UNUSUAL FACTS AND IDEAS
[no value]
“Crime Map“ Keeps Police Head Posted
[no value]
[no value]
[no value]
[no value]
WHEN Joseph F. Timilty, police commissioner of Boston, Mass., arrives at his office each morning, he need not pore through written files to find what has happened during the night. Instead, lamps glow upon a large-scale map of Boston and its environs, to show the location of crimes, accidents, and police officers at a glance.
PopularScience_19391201_0135_006_0100.xml
article
93
93
UNUSUAL FACTS AND IDEAS
[no value]
Polar Painter Brushes Up on Science
[no value]
[no value]
[no value]
[no value]
ONE of the 160 intrepid explorers who will make up the party led by Admiral Richard E. Byrd on a new expedition to the South Pole to stake out American claims to Antarctic territory (P.S.M., Nov. ’39, p. 63), is a landscape painter, Leland Curtis, of Los Angeles, Calif., who will supplement the work of photographers in depicting the terrain of America’s newest frontier.
PopularScience_19391201_0135_006_0101.xml
article
93
93
[no value]
[no value]
Homemade Three-Wheeled Crane Aids in Transplanting Trees
[no value]
[no value]
[no value]
[no value]
FOR transplanting orange trees, Ernie Thompson, of Strathmore, Calif., constructed the novel homemade tree mover pictured below. Suspended from a metal frame mounted on three rubber-tired wheels, split halves of an old steel oil drum are lowered on chains, placed around the exposed earth and roots surrounding a tree, and clamped together.
PopularScience_19391201_0135_006_0102.xml
article
94
94,95,96
[no value]
[no value]
"Ghost" VOICES FORM ODD COLLECTION
[no value]
[no value]
[no value]
EDWIN TEALE
SALVAGED from dusty attics and cluttered basements, more than half a thousand old-time phonograph records form the unique "voices of the past" collection of Robert Vincent, of New York City. William E. Gladstone, English premier under Queen Victoria; P. T. Barnum, the great American showman; Henry M. Stanley, the explorer who found Livingstone; Robert E. Peary, discoverer of the North Pole; Thomas A. Edison, Theodore Roosevelt, and a host of other noted persons speak out of the past through Vincent’s fascinating and historically invaluable file of old records.
PopularScience_19391201_0135_006_0103.xml
article
97
97
PHOTOGRAPHY
[no value]
Camera Fan Gets Long-Distance Shot
[no value]
[no value]
[no value]
[no value]
ALTHOUGH few persons have ever had a close-up view of the top of the 710-foot antenna tower of radio station KDKA, Pittsburgh, Pa., Byron McGill, National Broadcasting Company official, can show you exactly what it looks like. An amateur photographer, McGill hooked a camera to a four-inch astronomical refractor telescope fitted with a high-power eyepiece to give a magnification of 250.
PopularScience_19391201_0135_006_0104.xml
article
97
97
NEW INVENTIONS
[no value]
Dock-To-Boat Communicator Speeds Landing of Barges
[no value]
[no value]
[no value]
[no value]
MOUNTED on a post near the water’s edge at the Hudson River docks of an oil company in Albany, N. Y., a loudspeaker facilitates two-way communication between captains of incoming oil barges and the dispatcher in the dock office. The unit serves as both a loudspeaker and a microphone, picking up the captain’s words and returning the dispatcher’s.
PopularScience_19391201_0135_006_0105.xml
article
98
98
UNUSUAL FACTS AND IDEAS
[no value]
Chickens Tattooed To Foil Thieves
[no value]
[no value]
[no value]
[no value]
TATTOOING numbers on the wings of poultry has proved a valuable aid to farmers in eastern states, as a means of foiling chicken thieves. By means of punches composed of sharp needles arranged to form the numbers, indelible ink is inserted in the webbing of the wing back of the bone, making a permanent mark. Each farmer registers his individual number with the state police. In the event of theft, the number is reported and a watch is kept at produce markets for the stolen birds.
PopularScience_19391201_0135_006_0106.xml
article
98
98
NEW INVENTIONS
[no value]
Take This Puzzle Apart, and You Get a Penny
[no value]
[no value]
[no value]
[no value]
A PUZZLE with a cash reward is an innovation in entertainment devices. The puzzle is formed of ten pieces of wood—four pieces with square corners, two crossbars, and four round pegs. A hole drilled into one of the corner pieces permits the person working the puzzle to see a shiny new penny inside.
PopularScience_19391201_0135_006_0107.xml
article
99
99
UNUSUAL FACTS AND IDEAS
[no value]
Stamp Fans Get Sea-Bottom Post Office
[no value]
[no value]
[no value]
[no value]
MAIL your letters from the bottom of the sea. That is the interesting possibility offered by the recent establishment of an underwater post office set up in the photosphere in which the veteran explorer John E. Williamson is making studies of underwater life near Nassau, in the Bahama Islands.
PopularScience_19391201_0135_006_0108.xml
article
99
99
NEW INVENTIONS
[no value]
Practice Board for Table-Tennis Players
[no value]
[no value]
[no value]
[no value]
TABLE-TENNIS enthusiasts now can practice and polish up their strokes with an ingeniously simple mechanical opponent invented by Harold W. Frost, of Worcester, Mass. The device, made of boards hinged together so that they can be adjusted to different angles, is set up on one side of the table.
PopularScience_19391201_0135_006_0109.xml
article
100
100
HEALTH AND HYGIENE
[no value]
Hospital Infants Get Own “Apartments“
[no value]
[no value]
[no value]
[no value]
SURROUNDED by transparent walls of unbreakable plastic composition, new-born babies in the Sanitarium Hospital, Portland, Ore., live in tiny individual apartments where the air is completely changed every three minutes, and the temperature is maintained constantly at seventy-four degrees F.
PopularScience_19391201_0135_006_0110.xml
article
100
100
NEW INVENTIONS
[no value]
Vacuum-Cleaner Attachment Recovers Scrap Metal
[no value]
[no value]
[no value]
[no value]
BY THE use of a small trap attachment, portable vacuum cleaners can be used for cleaning out shelves and compartments containing nuts, screws, and other small parts, in a machine shop or factory. With the attachment, dust and dirt are sucked into the cleaner’s dust bag, while any metal objects drawn into the cleaning nozzle are caught in the trap where they can be recovered.
PopularScience_19391201_0135_006_0111.xml
article
100
100
NEW INVENTIONS
[no value]
Toy Bank Records Deposits
[no value]
[no value]
[no value]
[no value]
WHEN a coin is dropped into the slot of a new toy savings bank, an inked rubber stamp moves into place over a special deposit book inserted through the front of the metal box. Pushing a lever presses down the rubber stamp to record the amount of the deposit in the book.
PopularScience_19391201_0135_006_0112.xml
article
101
101
NEW INVENTIONS
[no value]
Foot Cornstalk Cutter Leaves the Hands Free
[no value]
[no value]
[no value]
[no value]
HARVESTING field corn or sugar cane is simplified by a novel cutter invented by F. W. Tappen, of Burzaco, Argentina. Bolted to a shoe, the tool is made of steel in the shape of a Y, with the inside edges sharpened. As the harvester walks along a row, he kicks at the base of each stalk, slicing it off cleanly.
PopularScience_19391201_0135_006_0113.xml
article
101
101
AVIATION
[no value]
Plane Fire Extinguisher Works Automatically
[no value]
[no value]
[no value]
[no value]
AUTOMATIC fire extinguishers, which operate instantaneously in the event of a crash, are being installed in all British military airplanes. A suspended weight reacts to any abnormal shock, releasing a stream of fire-quenching methyl bromide gas.
PopularScience_19391201_0135_006_0114.xml
article
101
101
UNUSUAL FACTS AND IDEAS
[no value]
Boy Builders Plan Long Trip in P.S.M. Cabin Cruiser
[no value]
[no value]
[no value]
[no value]
FROM plans published in POPULAR SCIENCE MONTHLY, three Buffalo, N. Y., youths, Clifford F. Baker, Jr., 16, C. Morgan Epes, 16, and John Ehinger, Jr., 15, constructed the trim outboard-powered motor boat pictured in the photographs below and at the right.
PopularScience_19391201_0135_006_0115.xml
article
102
102
AVIATION
[no value]
Collectors Go for Airline Labels
[no value]
[no value]
[no value]
[no value]
AIRLINE luggage labels, similar to the stickers placed on passengers’ baggage by steamship companies, have been added to the long list of things collected by hobbyists. Already there are said to be 10,000 enthusiasts who boast valuable collections, several of them containing more than 1,000 items.
PopularScience_19391201_0135_006_0116.xml
article
103
103
[no value]
[no value]
Ski-Equipped Stretchers Used by Alpine Troops
[no value]
[no value]
[no value]
[no value]
ACROSS snow-covered stretches of the upper Alps, Italian troops recently demonstrated the latest equipment for fighting on high-altitude battlefields. One of the innovations which was given a tryout by the mountain fighters was a stretcher on skis.
PopularScience_19391201_0135_006_0117.xml
article
103
103
UNUSUAL FACTS AND IDEAS
[no value]
Chinese-Cross Puzzle Puzzles Crack Puzzlers
[no value]
[no value]
[no value]
[no value]
EXPERT puzzlers have been baffled by the complicated interlocking puzzle devised by Wilfred Hallock, of Huntington Station, N. Y. Suggesting in its shape the familiar wooden Chinesecross puzzle, Hallock’s mechanical teaser is formed of pieces of brass.
PopularScience_19391201_0135_006_0118.xml
article
104
104,105,106
[no value]
[no value]
Night Prospecting ... A NEW HOBBY FOR AMATEUR MINERALOGISTS
[no value]
[no value]
[no value]
STERLING GLEASON
SQUATTING in the darkness at the edge of an unfinished highway in New Jersey, a lone man humped over a gravel pile left by the road builders. In his hand he held a long-barreled, nickel-plated flash light, and though its dim, purple beam was virtually invisible, he was flashing it methodically, back and forth, over the heaped-up rocks.
PopularScience_19391201_0135_006_0119.xml
article
107
107
UNUSUAL FACTS AND IDEAS
[no value]
Aquarium Finds “Goldfish Mine“ at Its Door
[no value]
[no value]
[no value]
[no value]
ALL the goldfish on display in the Franklin Park Aquarium in Philadelphia, Pa., have been fished out of the Schuylkill River flowing by the Aquarium’s front door, although these household pets are not and never have been native to the river.
PopularScience_19391201_0135_006_0120.xml
article
108
108,109,110,111
[no value]
[no value]
Dare-Devil Cyclist Cheats Death with Gadgets
[no value]
[no value]
[no value]
[no value]
WITH shattered glass swirling around him; with splintered timbers filling the air over his head; with twenty-foot streamers of flame billowing about his motor cycle, Ken Butler, crash king of the carnival thrill riders, has dared death for years to provide spine-tingling excitement for the crowd.
PopularScience_19391201_0135_006_0121.xml
article
112
112
AVIATION
[no value]
Seaplane Takes Off on Floating Track
[no value]
[no value]
[no value]
[no value]
So THAT seaplanes may be designed primarily for efficiency in flight rather than for overcoming the tremendous water resistance encountered while taking off, Thomas B. Rhines, of West Hartford, Conn., has devised an ingenious launching apparatus.
PopularScience_19391201_0135_006_0122.xml
article
112
112
UNUSUAL FACTS AND IDEAS
[no value]
Rotating Library Aids Clerks
[no value]
[no value]
[no value]
[no value]
BECAUSE the latest telephone books and commercial directories of over 1,000 cities in 118 countries had to be easily available for quick reference, a New York publishing firm built the odd rotating library shown at the left. Shelves around its fifty-foot circumference house the reference works, and the entire unit revolves once a minute before clerks placed at desks arranged in a circle around the library’s perimeter.
PopularScience_19391201_0135_006_0123.xml
article
113
113
UNUSUAL FACTS AND IDEAS
[no value]
Swagger Stick Combines Cane with Small Purse
[no value]
[no value]
[no value]
[no value]
WOMEN who are sticklers for the latest in fashion may soon be carrying a novel swagger stick that combines a cane with a small purse. Introduced not long ago at a fashionable race track, the novel cane has a purse fastened to it just below the handle.
PopularScience_19391201_0135_006_0124.xml
article
113
113
NEW INVENTIONS
[no value]
Push-Button Pipe Wrench
[no value]
[no value]
[no value]
[no value]
ONE-HAND operation is made possible in a new pipe wrench which has a lever and ratchet mechanism that replaces the conventional adjustable knurled wheel. To adjust the tension on the wrench jaws, the user pumps a small finger lever, as shown at the left.
PopularScience_19391201_0135_006_0125.xml
article
113
113
UNUSUAL FACTS AND IDEAS
[no value]
Clay and Car Parts Make Up This House
[no value]
[no value]
[no value]
[no value]
SEVERAL years ago, George Daynor, a penniless Klondike gold prospector, moved in on a Vineland, N. J., swamp used as an automobile junk yard. Daynor drained the swamp, located a freshwater brook, and, using only the materials at hand, built the curious homestead pictured at the left.
PopularScience_19391201_0135_006_0126.xml
article
114
114
UNUSUAL FACTS AND IDEAS
[no value]
Real Rosebud Jewelry Is New Winter Fashion
[no value]
[no value]
[no value]
[no value]
BRACELETS and necklaces made of real rosebuds are slated to be a popular winter fashion for women, according to Miss Elizabeth Day, of New York City, who invented the flower jewelry shown in the accompanying photographs. Freshly picked dwarf rosebuds are treated with a special preparation to prevent moisture evaporation, and the blooms are then fastened to a bracelet or necklace chain of light metal, fitted with tiny clasps that hold the flowers securely in place.
PopularScience_19391201_0135_006_0127.xml
article
114
114
UNUSUAL FACTS AND IDEAS
[no value]
Father and Son Run Basement Business
[no value]
[no value]
[no value]
[no value]
MAKING model windmills for sale as souvenirs is the novel father-and-son business carried on in the basement workshop of Claude Dunnewin, of Central Park, Mich. The tiny mills bring a comparatively high price since they are all fashioned from small blocks of solid mahogany.
PopularScience_19391201_0135_006_0128.xml
article
115
115
UNUSUAL FACTS AND IDEAS
[no value]
He Squeezes 144,000,000 Oranges a Year
[no value]
[no value]
[no value]
[no value]
SIXTEEN years ago, Frank W. Bireley, then a poor student trying desperately to earn his way through Stanford University at Palo Alto, Calif., bought an orange squeezer and a few crocks. Before sunup, and late into the night, he sliced the golden fruit, laboriously pressed out the juice, made orangeade, and offered it for sale to restaurants, hotels, and campus eating clubs.
PopularScience_19391201_0135_006_0129.xml
article
116
116
HEALTH AND HYGIENE
[no value]
Oxygen Apparatus Is Rigged by Doctor in Emergency Case
[no value]
[no value]
[no value]
[no value]
NEAR death from the effects of whooping cough from which they had been suffering for two weeks, the four-month-old twin brothers, Charles Louie and Larry Decker Faulkner, of Idabel, Okla., recently were brought through a critical stage of their illness by the quick thinking and resourcefulness of the young country doctor attending them.
PopularScience_19391201_0135_006_0130.xml
article
116
116
UNUSUAL FACTS AND IDEAS
[no value]
Study Films That Can't Be Seen
[no value]
[no value]
[no value]
[no value]
FILMS one molecule thick—about one ten millionth of an inch, and utterly invisible—are being studied by scientists at the General Electric Research Laboratory to discover little-understood characteristics of the tiny electrical charges existing on their surfaces.
PopularScience_19391201_0135_006_0131.xml
article
116
116
NEW INVENTIONS
[no value]
Clamps Let Skiers Walk Uphill
[no value]
[no value]
[no value]
[no value]
SIMPLE to install, clamps that permit skiers to walk uphill without sliding backward on the snow are now available. The units, one of which is illustrated above, stay close to the skis when coasting forward, but automatically open the instant the ski direction is reversed.
PopularScience_19391201_0135_006_0132.xml
article
117
117
AVIATION
[no value]
Control Room Charts Air-Raid Defense
[no value]
[no value]
[no value]
[no value]
LOCATED “somewhere in London,” the control room shown in the photograph above forms the nerve center of the British capital’s civilian air-raid defense system. Twin maps, each nine feet square, hang on the wall. With colored pins, the location of each bomb dropped on the city can be marked on one map, and at the same time field units can be dispatched to the spot to render assistance to civilians.
PopularScience_19391201_0135_006_0133.xml
article
117
117
NEW INVENTIONS
[no value]
New Watermark Detector Aids Stamp Collectors
[no value]
[no value]
[no value]
[no value]
THREE pieces of colored glass, set in a circular plastic holder, provide the stamp collector with a new aid in detecting watermarks. The stamp is placed in a black dish, moistened with benzine, and viewed through the filters. Depending upon the color of the stamp, one of the filters will make the watermark show up clearly.
PopularScience_19391201_0135_006_0134.xml
article
117
117
UNUSUAL FACTS AND IDEAS
[no value]
Silver Rustproofs Steel
[no value]
[no value]
[no value]
[no value]
TINY traces of silver, added to the composition of stainless steel, will do much to overcome the metal’s inability to withstand the corrosive action of salt water, research scientists at the Massachusetts Institute of Technology have discovered.
PopularScience_19391201_0135_006_0135.xml
article
118
118
HEALTH AND HYGIENE
[no value]
Operating-Room Camera Dolly
[no value]
[no value]
[no value]
[no value]
HOVERING high over the operating table in the Middlesex General Hospital, in New Brunswick, N. J., a huge one-eyed “mechanical monster,” sheathed in sterile white cloth, peers down through a battery of brilliant lights. Designed by Dr. Marshall Smith, New Brunswick surgeon, the strange apparatus is a camera dolly, built to hold a photographer directly over the operating table, so that motion pictures in full color of delicate operations may be made with a close-up viewpoint heretofore impossible to achieve.
PopularScience_19391201_0135_006_0136.xml
article
119
119
AVIATION
[no value]
Homemade Oxygen Mask
[no value]
[no value]
[no value]
[no value]
TO SAVE himself the cost of a new oxygen mask, Art Bussy, airplane racing pilot, made his own from an automobile-battery hydrometer and a football bladder. Oxygen piped to the bladder is forced as needed into the hydrometer bulb, which is strapped to his head so that his nose sticks through a hole cut into the bulb’s side.
PopularScience_19391201_0135_006_0137.xml
article
119
119
AUTOMOBILES
[no value]
Curb Feeler Aids Parking
[no value]
[no value]
[no value]
[no value]
L-SHAPED arms, attached to front and rear bumpers, help motorists to park close to the curb without scraping hub caps or fenders, in a device just marketed. When the tips of the arms touch the curb, electric contacts are closed, lighting a warning lamp on the dashboard.
PopularScience_19391201_0135_006_0138.xml
article
119
119
NEW INVENTIONS
[no value]
Players Hear Ponies Run in New Game
[no value]
[no value]
[no value]
[no value]
A PHONOGRAPH record plays a vital part in a novel horse-race game just placed on the market. Players select their horses as represented by markers on a game board. The record is then placed on a phonograph turntable and started. A simulated radio broadcast of an actual horse race is then heard, with the name of the winning horse announced at the end.
PopularScience_19391201_0135_006_0139.xml
article
120
120
NEW INVENTIONS
[no value]
Shuffleboard Played on a Small Table
[no value]
[no value]
[no value]
[no value]
SHUFFLEBOARD, a game which commonly requires a considerable amount of space, can be played on a small table-type game board available in game and toy stores. Played by either two or four persons, the game employs sliding wooden disks which are propelled from one end of the rectangular table to the other by means of spring-operated plungers, one at each end of the board, as shown in the photograph at the left.
PopularScience_19391201_0135_006_0140.xml
article
120
120
[no value]
[no value]
Portable Torch Aids Firemen
[no value]
[no value]
[no value]
[no value]
ESPECIALLY valuable for fire-fighters, a new portable oxyacetylene cutting torch is a self-contained unit weighing only forty-three pounds and fitted with a harness so that it can be strapped to a fireman’s body over a special padded vest.
PopularScience_19391201_0135_006_0141.xml
article
121
121
UNUSUAL FACTS AND IDEAS
[no value]
Museum Gets Mammoth Skull
[no value]
[no value]
[no value]
[no value]
TEN feet long and three feet high, the terrifying skull of a sixty-foot plesiosaur that inhabited the seas 120,000,000 years ago, was placed on exhibition recently at the Harvard Museum of Comparative Zoölogy, in Boston, Mass. Ninety-two interlocking spiked teeth are embedded in the jaws of the giant.
PopularScience_19391201_0135_006_0142.xml
article
121
121
AVIATION
[no value]
Catapult Launches Radio Target Plane
[no value]
[no value]
[no value]
[no value]
LAUNCHED into the air by a catapult, a radio-controlled miniature plane tested recently by U. S. Army Air Corps engineers for use as a target for aerial-gunnery practice releases its own parachute and drifts back to earth when its work is done.
PopularScience_19391201_0135_006_0143.xml
article
122
122,123,124,125
[no value]
[no value]
Army Movies Help Train Our Soldiers for War
ACTION! CAMERA! OFFICERS AND ENLISTED MEN ARE ACTORS IN FILMS THAT SERVE AS DRILLMASTERS FOR RECRUITS IN PEACETIME, AND PLAY A VITAL PART IN NATIONAL DEFENSE
[no value]
[no value]
ARTHUR GRAHAME
FROM somewhere behind us came the high-pitched whine of the engines of fast-flying aircraft. A few yards ahead of the army truck on whose roof we were riding, a platoon of infantry was marching briskly down the dusty road. The young officer in command turned and stared hard toward the menacing sound of the approaching planes.
PopularScience_19391201_0135_006_0144.xml
article
126
126
MODELS
[no value]
Pendulum Stabilizer for Model Plane
[no value]
[no value]
[no value]
[no value]
ANNOYED by frequent crack-ups that practically demolished his model airplane every time it went into a dive, Ed Carstens, of Warrensburg, N. Y., developed a novel pendulum stabilizing device. When the ship starts to dive, a pendulum hanging down from the fuselage swings forward, operating control lines that automatically adjust the elevators to bring the craft down safely.
PopularScience_19391201_0135_006_0145.xml
article
126
126
NEW INVENTIONS
[no value]
Pocket Gauge Measures Speed of Wind
[no value]
[no value]
[no value]
[no value]
ESPECIALLY useful for yachtsmen, hunters, golfers, amateur plane pilots, and other sportsmen, as well as forest rangers and meteorologists, a low-cost wind indicator now on the market is small enough to be tucked into a vest pocket. Built of materials that are nonmagnetic and rustproof, the instrument is made with a dial face calibrated at five-mile intervals up to thirty miles an hour, or at ten-mile intervals up to sixty miles an hour.
PopularScience_19391201_0135_006_0146.xml
article
127
127
UNUSUAL FACTS AND IDEAS
[no value]
Odd Ice Bike Puts Hockey on Wheels
[no value]
[no value]
[no value]
[no value]
“BICYCLE HOCKEY,” in which players are mounted on special bikes equipped with runners instead of on skates, was foreshadowed as a new sport possibility by a recent exhibition at a rink in Brighton, England. Freddie Chapman, riding a curious “ice bike” of his own design, whizzed about the rink wielding a hockey stick in competition with another player mounted on skates in the conventional manner.
PopularScience_19391201_0135_006_0147.xml
article
127
127
NEW INVENTIONS
[no value]
Cot Folds into Small Bundle
[no value]
[no value]
[no value]
[no value]
FOLDING up into a flat and compact bundle, hardly larger than a brief case, a new collapsible cot is equipped with a handle for transporting it as a piece of luggage. Opened out, the cot provides a hammock-type bed, seventy-three inches long and twenty-seven inches wide.
PopularScience_19391201_0135_006_0148.xml
article
128
128
UNUSUAL FACTS AND IDEAS
[no value]
Old Game Resembles Baseball and Golf
[no value]
[no value]
[no value]
[no value]
SWINGING a ten-foot mallet with a combination golf and baseball stroke, the batsman pictured at the top of the page smashes a puck 300 yards down a fairway in the game of hornuss, one of the most ancient sports known, now enjoying a revival of popularity in Switzerland.
PopularScience_19391201_0135_006_0149.xml
article
129
129
UNUSUAL FACTS AND IDEAS
[no value]
Camouflage Hides Power-Plant Towers
[no value]
[no value]
[no value]
[no value]
HUGE cooling towers that form a part of an electric generating plant at Freemen’s Meadow, near Leicester, England, have been ingeniously camouflaged recently as a protection against the bombing planes of raiding enemy air fleets. Painted like stage scenery, or a mammoth Hollywood outdoor movie set, the vase-shaped cooling towers have a strange and fantastic appearance when viewed close-up, as in the photograph reproduced above, but seen from a distance, it is said, the group is exceptionally hard to identify as the towers of a power plant.
PopularScience_19391201_0135_006_0150.xml
article
129
129
NEW INVENTIONS
[no value]
Barber's Hair Collector Uses Suction Collar
[no value]
[no value]
[no value]
[no value]
A HAIR-CATCHING suction collar, designed for barber-shop use by Morris Hartzman, of Dubuque, Iowa, collects hair as it falls from a barber’s scissors, sucks it down through a pipe and dumps it in a collection bag similar to that used in a vacuum cleaner.
PopularScience_19391201_0135_006_0151.xml
article
130
130,131
[no value]
[no value]
FIGHTING FOREST FIRES WITH BOMBS FROM THE AIR
[no value]
[no value]
[no value]
[no value]
FIREPROOFING foliage with chemical bombs dropped from the sky is the dramatic new method of fighting forest fires recently tried out in California. Wheeling over the San Bernardino mountains a few weeks ago, Gordon Ingraham, U. S. Forestry Service pilot, demonstrated how the plan will work.
PopularScience_19391201_0135_006_0152.xml
article
132
132
UNUSUAL FACTS AND IDEAS
[no value]
Fast “Mosquito Boats“ Aid British Navy
[no value]
[no value]
[no value]
[no value]
TORPEDOES plunging ahead past her knifelike bow, the high-speed motor torpedo boat shown racing through the waters of the English Channel in the photograph above is an important fighting unit of the British Navy. Tremendously fast, the craft is designed to rely on her speed and maneuverability to offset her lack of armor.
PopularScience_19391201_0135_006_0153.xml
article
133
133
The Man with the Net
[no value]
The Man with the Net
[no value]
[no value]
[no value]
[no value]
AUTHORITIES estimate that 5,000 different languages are spoken in the world. RIVET HEADS on the outside of a big airplane produce enough resistance at top speeds to require 180 additional horsepower on the plane. GEESE were the first domesticated birds.
PopularScience_19391201_0135_006_0154.xml
article
133
133
NEW INVENTIONS
[no value]
Three Face Masks in One
[no value]
[no value]
[no value]
[no value]
A “TRIPLE-THREAT” mask, with interchangeable parts, has just been placed on the market for workmen. Fitted with a wire-screen shield, it is used in babbitting; with a transparent-plastic window, it is suitable for buffing and polishing; with a shielded glass window, it guards a welder.
PopularScience_19391201_0135_006_0155.xml
article
133
133
AUTOMOBILES
[no value]
Car Sponge Fits the Hand
[no value]
[no value]
[no value]
[no value]
DEVISED as an aid for cleaning automobiles, a new sponge is shaped to fit the hand and is chemically treated to remove dirt and grime. In addition, there is a pocket in the sponge in which a cake of soap can be placed.
PopularScience_19391201_0135_006_0156.xml
article
133
133
UNUSUAL FACTS AND IDEAS
[no value]
Collars Test Crickets
[no value]
[no value]
[no value]
[no value]
PAPER collars, that kept crickets from eating after they had been sprayed with poison in a Montana laboratory, recently helped determine that sprays are as effective as poisoned grain for killing them.
PopularScience_19391201_0135_006_0157.xml
article
134
134
UNUSUAL FACTS AND IDEAS
[no value]
If Tombstones Told the Truth
[no value]
[no value]
[no value]
BERTON BRALEY
[no value]
PopularScience_19391201_0135_006_0158.xml
article
135
135
NEW INVENTIONS
[no value]
Elevator Speeds Fire-Ladder Rescues
[no value]
[no value]
[no value]
[no value]
QUICKER rescue of persons trapped by flames in the upper stories of burning buildings is the purpose of a life-saving elevator for fire departments, developed by Morris Honig, of New York City. In the illustration at the right, Honig is shown with a model of his device staging a theoretical rescue at the window of a tall building.
PopularScience_19391201_0135_006_0159.xml
article
135
135
AUTOMOBILES
[no value]
Autographed Auto Tours Country To Get Signatures
[no value]
[no value]
[no value]
[no value]
AUTOGRAPHS of more than 600 Hollywood personalities, that will never be pasted in an autograph collector’s album, adorned the entire surface of an automobile in which Miss Louise Rose, representing the Motion Picture Producers Association, completed a transcontinental tour a short time ago.
PopularScience_19391201_0135_006_0160.xml
article
136
136
UNUSUAL FACTS AND IDEAS
[no value]
Detector Takes Air Temperature Mile Above Earth
[no value]
[no value]
[no value]
[no value]
MEASURING the exact temperature of the atmosphere high above the earth is the purpose of the giant hornlike device shown at the left, designed by Dr. Charles Heck, of North Carolina State College in Raleigh. Designed to help in forecasting changes in the weather, it takes the temperature of drops of water over a mile up.
PopularScience_19391201_0135_006_0161.xml
article
136
136
MODELS
[no value]
Amphibian Model Has Ten-Foot Wing Span
[no value]
[no value]
[no value]
[no value]
MADE of about 3,000 pieces of balsa wood, each cut to fit with an old razor blade as the only tool, a novel amphibian, gas-driven model airplane constructed by John Abate, of Rochester, N. Y., is fitted with wheels which retract through sponsons that serve to balance the hull when the craft is afloat.
PopularScience_19391201_0135_006_0162.xml
article
137
137
UNUSUAL FACTS AND IDEAS
[no value]
Barbers Furnish Holder for Customer's Glasses
[no value]
[no value]
[no value]
[no value]
As AN added service, many barber shops are now providing an individual padded leather case in which a customer may place his eyeglasses to protect them while he is being shaved or having a haircut.
PopularScience_19391201_0135_006_0163.xml
article
137
137
NEW INVENTIONS
[no value]
Man Bites Tender Hot Dog
[no value]
[no value]
[no value]
[no value]
HOT DOGS with tender skins are promised by a new process discovered by chemists of a Chicago meat-packing concern. Soaking the casings in pineapple juice softens cel’ tissues, making the skins easier to eat.
PopularScience_19391201_0135_006_0164.xml
article
137
137
AUTOMOBILES
[no value]
Truck Telltale Checks Driver's Report
[no value]
[no value]
[no value]
[no value]
SUSPENDED from the dashboard of each truck operated by a California firm, a pendulum carries a small pen which traces a line on a clock-driven, rotating cardboard disk, to chart the truck’s starts, stops, speed, and running time during a day’s operation.
PopularScience_19391201_0135_006_0165.xml
article
138
138
UNUSUAL FACTS AND IDEAS
[no value]
Seal Hunter Supplies Zoos and Shows
[no value]
[no value]
[no value]
[no value]
TRAPPING sea lions from an island rookery thirty miles off the coast of California is the unusual business of Capt. George M. McGuire. With two former cowboys as helpers, McGuire spreads a net across the mouth of an island cove into which the sea lions come.
PopularScience_19391201_0135_006_0166.xml
article
138
138
AVIATION
[no value]
'Chute Pack on Shoulders Allows Pilot More Room
[no value]
[no value]
[no value]
[no value]
BECAUSE he is unable to wear an ordinary seat-type parachute and still get into the cramped cockpit of his racing plane, Tony Le Vier, six-foot two-inch racing pilot, uses a novel headrest parachute that is said to be the only one of its kind in the world.
PopularScience_19391201_0135_006_0167.xml
article
138
138
NEW INVENTIONS
[no value]
Milady's Dressing Table Gives Day or Night Light
[no value]
[no value]
[no value]
[no value]
BECAUSE make-up applied to the face by daylight stands a good chance of appearing decidedly different in artificial light, specially lighted dressing tables are under consideration by a large eastern manufacturing concern. Buttons would turn on lights to simulate daylight or artificial light, as desired, and the user could thereby apply cosmetics suitable to the occasion.
PopularScience_19391201_0135_006_0168.xml
article
139
139
UNUSUAL FACTS AND IDEAS
[no value]
Historic Voyage Is Reënacted for Films
[no value]
[no value]
[no value]
[no value]
EIGHTEEN days out of the port of Cork, Ireland, her boilers fed by coal, several barrels of resin, and part of her deck planking, the steamer Sirius chugged proudly into New York harbor on April 23, 1838, the first ship in history to cross the Atlantic Ocean entirely by steam power.
PopularScience_19391201_0135_006_0169.xml
article
140
140,141,142,143
[no value]
[no value]
DRUGS FROM DOG HAIR
EXTRACTS CONCOCTED FROM ODD MATERIALS AID IN FIGHT AGAINST STRANGE AILMENTS
[no value]
[no value]
R. DEWITT MILLER
"IS THAT essence of wood shavings ready yet? You know that carpenter may lose his job if he doesn’t get it right away.” The nurse handed a tiny, red-stoppered vial to the laboratory chief. “Here it is,” she said quietly. “And we’ll have the essence of saddle leather ready by tonight.
PopularScience_19391201_0135_006_0170.xml
article
144
144
HEALTH AND HYGIENE
[no value]
Dental Lamp Clamps on Patient's Mouth
[no value]
[no value]
[no value]
[no value]
A LIGHT for illuminating the mouth of a dental patient, just placed on the market, clamps to the patient’s cheek, thereby freeing him from the glare of external lights and relieving the dentist from the necessity of holding a small light in the patient’s mouth.
PopularScience_19391201_0135_006_0171.xml
article
144
144
HEALTH AND HYGIENE
[no value]
All-Metal Stretchers
[no value]
[no value]
[no value]
[no value]
STRETCHERS made entirely of metal are now being used in England in first-aid stations set up in readiness for enemy air raids. The tubular frames are bent near the end to form legs. Fitted with metal springs, the stretchers are much stronger and will stand considerably more abuse and hard usage than wood-and-canvas types.
PopularScience_19391201_0135_006_0172.xml
article
144
144
NEW INVENTIONS
[no value]
Outlet-Cord Adapters Fit Almost Any Socket
[no value]
[no value]
[no value]
[no value]
No MATTER what type of electric outlet a tourist finds on his travels, he can be sure to have the use of his electric razor or other electric appliance if he carries a set of plug adapters, now available. The kit, shown in the photograph reproduced above, provides an extension cord and various styles of adapters for use with practically any kind of electric socket.
PopularScience_19391201_0135_006_0173.xml
article
144
144
UNUSUAL FACTS AND IDEAS
[no value]
Bugs Flown to Work Here
[no value]
[no value]
[no value]
[no value]
FRIENDLY insects for fighting beetles that attack asparagus made an unusual shipment in a recent transatlantic flight of the Pan American Airways Atlantic Clipper. Sent by the U. S. Department of Agriculture’s European field station near Paris, France, the flies were to be turned loose in this country to carry on their good work of killing parasites.
PopularScience_19391201_0135_006_0174.xml
article
145
145
NEW INVENTIONS
[no value]
Air Bomb Releases Sky Advertisement
[no value]
[no value]
[no value]
[no value]
BURSTING high overhead with a loud explosion to attract attention, a novel aerial bomb for advertising purposes has just been introduced. At the first glance, spectators see only a huge cloud of smoke as the bomb bursts. In a moment, the smoke clears and a giant object—an oversize copy of the bottle, food package, automobile tire, or other product being advertised—is revealed floating in space.
PopularScience_19391201_0135_006_0175.xml
article
146
146
HEALTH AND HYGIENE
[no value]
Can Deadly Snake Venom Save Lives?
[no value]
[no value]
[no value]
[no value]
EXACTLY how does the venom of a deadly water-moccasin, a snake native to the southern United States, act on the vital processes of a human being? That is the problem being tackled by Prof. Robert V. Brown, University of Chicago physiologist, who believes that the answer may provide a way to control hemorrhage and falling blood pressure, for, he states, small doses of moccasin venom have already been used to decrease the susceptibility of human beings to hemorrhages.
PopularScience_19391201_0135_006_0176.xml
article
146
146
UNUSUAL FACTS AND IDEAS
[no value]
"Sight" Chart Tests Television Camera
[no value]
[no value]
[no value]
[no value]
FLARING vertical and horizontal lines of various widths and spacing, solid and open squares, rectangles, and other shapes form a queer chart developed by General Electric engineers for checking the adjustment and operation of television cameras.
PopularScience_19391201_0135_006_0177.xml
article
147
147
AVIATION
[no value]
Down Is Up for This Upside-Down Plane
[no value]
[no value]
[no value]
[no value]
IT MAKES little difference to Michael Murphy, stunt flyer, and his mechanic, Eddie Leach, whether they land their new plane right side up or upside down. For the novel monoplane is fitted with two sets of landing wheels, one in the usual position and the other on top of the plane.
PopularScience_19391201_0135_006_0178.xml
article
147
147
NEW INVENTIONS
[no value]
Cable Drill Clears Sewer Pipes
[no value]
[no value]
[no value]
[no value]
IN THE odd photograph below, it looks as though some Simple Simon were trying his luck at fishing in a city sewer. However, the picture actually shows a special drilling apparatus that draws a steel wire through a sewer pipe, and cuts off any tree roots growing between joints.
PopularScience_19391201_0135_006_0179.xml
article
147
147
AUTOMOBILES
[no value]
License-Key Chain for Motorists
[no value]
[no value]
[no value]
[no value]
LICENSE HOLDER and key chain are combined in a novel accessory for motorists. Rolled up, a driver’s license or registration certificate is inserted within a hollow tube of plastic material which is attached by a chain to the ignition key of the car.
PopularScience_19391201_0135_006_0180.xml
article
148
148,149
PHOTOGRAPHY
[no value]
LATEST IDEAS FOR CAMERA FANS
[no value]
[no value]
[no value]
[no value]
USING the heat of an ordinary 100watt electric bulb to dry photographic prints, a simple device recently introduced for amateurs permits quick drying and ferrotyping in a minimum of space. The drier consists of a cylinder of chromecoated metal and a canvas cover.
PopularScience_19391201_0135_006_0181.xml
article
150
150,246
POPULAR SCIENCE Question Bee
[no value]
POPULAR SCIENCE Question Bee
[no value]
[no value]
[no value]
[no value]
1 Mistletoe is (a) a kind of evergreen tree (b) a parasitic shrub (c) a fern (d) a member of the thistle family. 2 In an automobile, the distributor regulates the flow of (a) gasoline (b) oil (c) electricity (d) water. 3 Divers working at great depths now avoid the “bends” by breathing oxygen and (a) chlorine (b) methane (c) helium (d) nitrous oxide.
PopularScience_19391201_0135_006_0182.xml
article
151
151
Un-Natural History
[no value]
Un-Natural History
[no value]
[no value]
[no value]
Gus Mager
[no value]
PopularScience_19391201_0135_006_0183.xml
article
152
152,153
HOUSEHOLD AIDS
[no value]
Conveniences for the Housewife
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0184.xml
article
154
154,155,156,243,245
Gus Takes a Holiday
[no value]
Gus Takes a Holiday
Why Is It That a Day Off Just Never Is an Off Day? Gus Tried To Figure That Out All One Busy Morning
[no value]
[no value]
MARTIN BUNN
EVER since the World’s Fair opened, Gus Wilson had been saying that he was going to take a day off and get a preview of what the world is going to be like tomorrow. But the Model Garage was even busier than usual all summer, so Gus kept putting off his holiday.
PopularScience_19391201_0135_006_0185.xml
article
157
157
[no value]
[no value]
THE HOME WORKSHOP
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0186.xml
article
158
158,159,160,161
THE HOME WORKSHOP
[no value]
It's the Finest Hobby of All!
WHY YOU SHOULD START A HOME WORKSHOP...AND HOW TO DO IT
[no value]
[no value]
EDWIN M. LOVE
What is a home workshop ? A HOME workshop is a place where a man can ride his hobby and indulge his creative bent. As he builds a cabinet, a ship model, or a desk set in copper, his business cares are forgotten, his worries vanish, and he relaxes in body and mind.
PopularScience_19391201_0135_006_0187.xml
article
160
160
SHOP DATA FILE
WOODWORKING
BENCH FOR BEGINNERS
[no value]
[no value]
[no value]
[no value]
The top is a 2" by 12" plank smoothed on top and edges. Lap a board under the rear edge for a tool tray, and another on the back for a rack. Close the left end with a triangular block sloping inward toward the right. Notch upper stretchers to fit the top.
PopularScience_19391201_0135_006_0188.xml
article
162
162,163,164,165,166
THE HOME WORKSHOP
[no value]
ICE BOAT... 1940 MODEL
AN EASILY BUILT, MUCH IMPROVED DESIGN WITH FOUR RUNNERS MOUNTED ON SPRINGY FOREAND-AFT PLANKS
[no value]
[no value]
J. JULIUS FANTA
SPEEDY, stable, and spinproof, this new ice boat Mercury embodies the latest improvements in design. It is a four-runner craft with long, springy fore-and-aft runner planks. These planks assure resiliency and comfortable riding qualities, yet keep the runners in perfect alignment.
PopularScience_19391201_0135_006_0189.xml
article
167
167
HINTS FOR THE HANDY MAN
[no value]
Steam Box for Special Work Built from Two Oil Drums
[no value]
[no value]
[no value]
JOHN G. ROBERTS
FACED with the problem of bending long wooden runners for a motor sled he was making, one amateur mechanic constructed a steam box from two oil barrels, placed one on top of the other, as illustrated at the left. A rectangular opening was cut in the top and bottom of the upper drum and in the top of the lower one to permit the wood to go through into the bottom barrel.
PopularScience_19391201_0135_006_0190.xml
article
167
167
MODELS
[no value]
Clamps for Model Making
[no value]
[no value]
[no value]
S. J. GANCHER
SMALL clamps for model making are easily improvised from a number of commonplace objects. Spring wooden clothespins with the jaws shaped as necessary and steel paper clips are frequently used. A discarded ruling pen is excellent for very small work, as are bobby pins and small bolts with large washers.
PopularScience_19391201_0135_006_0191.xml
article
167
167
SHOP DATA FILE
WOODWORKING
BRAZING NARROW BAND SAWS
[no value]
[no value]
[no value]
[no value]
Square broken ends of blade and file bevel on outside of one and inside of the other. Band saws should have an even number of teeth. Make the bevel ⅜" long on ½" or narrower blades. Clamp ends in brazing clamp so that backs are in line. Cover the filed surfaces and a piece of silver solder, the size of the joint, with a paste of borax mixed with water.
PopularScience_19391201_0135_006_0192.xml
article
168
168,169
CRAFTWORK
[no value]
A CHARMING LITTLE CAPE COD DOLL HOUSE
[no value]
[no value]
[no value]
[no value]
DESIGNED in the style of a picturesque little Cape Cod cottage, this doll house is an admirable Christmas present. Quarter-inch plywood is used throughout, with the exception of a thicker base, and the whole is assembled with casein glue and brads.
PopularScience_19391201_0135_006_0193.xml
article
170
170,171
new SHOP IDEAS
[no value]
Lathe Accessories You Can Make
[no value]
[no value]
[no value]
HOWARD R. HEYDORF
AMATEUR machinists usually enjoy making accessories for their metal-turning lathes, and several of these are shown in the accompanying illustrations. Of all the methods of illuminating lathe work, the tool-post lamp is considered the best.
PopularScience_19391201_0135_006_0194.xml
article
171
171
NEW SHOP IDEAS
[no value]
How to Pour Liquids Neatly from Rectangular Cans
[no value]
[no value]
[no value]
W. A. CRAIG
FOR pouring liquids such as varnishes and oils from square or rectangular cans that have the opening in one corner of the top, the can should be held so that the opening is up rather than down. The opening then remains at a sufficient elevation with respect to the fluid in the can so that nothing escapes until the can is nearly horizontal, and the pouring can be done neatly and without dribbling.
PopularScience_19391201_0135_006_0195.xml
article
172
172
NEW SHOP IDEAS
[no value]
A Hammer-Operated Punch for Light Work
[no value]
[no value]
[no value]
[no value]
IF OXYACETYLENE welding equipment is available, it is a comparatively simple matter to construct a small punch for making holes in spring steel up to 3/32" thick and mild steel ⅛” thick. The arm is cut from a piece of ½" plate to the end of which is welded a piece of 1" shafting with a hole drilled through it to serve as a guide for the punch.
PopularScience_19391201_0135_006_0196.xml
article
172
172
NEW SHOP IDEAS
[no value]
Simple Wire Stand Supports Magnifier for Drafting
[no value]
[no value]
[no value]
[no value]
FOR very finely detailed drafting or bench work on minute parts, a large magnifying glass may be supported by means of a wire frame made as shown below. It holds the glass at the proper distance to keep it in focus, thus leaving both hands free for working.
PopularScience_19391201_0135_006_0197.xml
article
172
172
NEW SHOP IDEAS
[no value]
Rubber Band Marks a Triangular Scale
[no value]
[no value]
[no value]
D. D. GURNEE
MUCH time can be saved in using a triangular drafting scale if a rubber band is used as illustrated above to show at a glance the edge being used. A marker, such as a small piece of drafting tape, is attached to the band adjacent to this edge.
PopularScience_19391201_0135_006_0198.xml
article
173
173
NEW SHOP IDEAS
[no value]
Fastening Drawings with Paper Tape
[no value]
[no value]
[no value]
WILLIAM G. PARTKIN
DRAFTING tape, now so generally used to fasten paper on drawing boards, is theoretically ideal, but sometimes dirt gets into the gum on the tape and soils the drawing. This can be avoided by applying the tape as illustrated below. A small piece is stuck to the underside of the paper at each corner, gummed side up, with half the width extending beyond the edge.
PopularScience_19391201_0135_006_0199.xml
article
173
173
NEW SHOP IDEAS
[no value]
Ball Bearings Improve Jaws of Steady Rest
[no value]
[no value]
[no value]
GEORGE S. WALKER
BY ALTERING a lathe steady rest as illustrated above and adding three ball bearings, work may be turned in it at high speed without being scored by the jaws. Dimensions will have to be adapted, of course, to suit the steady rest, but in this case 1½" ball races were fastened to the jaws in such a way that the rim of the races would bear against the work to be supported.
PopularScience_19391201_0135_006_0200.xml
article
173
173
SHOP DATA FILE
ELECTRICAL
CARRYING CAPACITY OF WIRES
[no value]
[no value]
[no value]
[no value]
Rubber-covered copper wires have a safe carrying capacity as indicated in the following table. In wiring fixtures, Nos. 18 and 16 are usually used; the other sizes are for circuit runs, mains, and submains. However, when Nos. 18 and 16 are used in portable cords, they may carry 5 and 7 amperes respectively.
PopularScience_19391201_0135_006_0201.xml
article
174
174,175
WOODWORKING
[no value]
Boat-Planking Hints
[no value]
[no value]
[no value]
BRUCE
WILLARD CRANDALL
ON THE simplest flat-bottom boats, straight planks can be used for planking, but in the case of all more complicated designs at least some of the planks will be found to take various peculiar shapes. One of the simplest ways to find the correct shape is to clamp the plank to be fitted in place over the framework of the boat and as close to the plank it is to fit against as possible, without forcing; then transfer the shape from the edge of the other plank by means of a pencil compass.
PopularScience_19391201_0135_006_0202.xml
article
175
175
HINTS FOR THE HANDY MAN
[no value]
Suction Cups Painted to Match Walls
[no value]
[no value]
[no value]
K. L. R.
RUBBER suction cups, which are usually black, can be made less conspicuous on walls finished in white or pastel shades by painting them with the elastic white rubber-base coating sold by automobile supply stores for use on the side walls of tires.
PopularScience_19391201_0135_006_0203.xml
article
175
175
HINTS FOR THE HANDY MAN
[no value]
Jar Rings Support Extension Cords
[no value]
[no value]
[no value]
W. J. WHITBECK
EXTENSION lamp cords may be safely supported when necessary by looping rubber Mason jar rings around the cord as shown. The ring may be hooked over a convenient nail or fastened with a thumb tack through the lip. The advantage of this method over using staples or tacks is that the soft rubber will not fray the cord and will “give” somewhat if a sudden strain is applied.
PopularScience_19391201_0135_006_0204.xml
article
175
175
HINTS FOR THE HANDY MAN
[no value]
Ornamental Flower Stands Bent from Junked Brake Rods
[no value]
[no value]
[no value]
W. J. V.
ORNAMENTAL flowerpot stands are easily made without either a forge or a welding outfit from ordinary round steel rods such as are used for brake rods on autos. Full-size drawings should first be made on heavy paper, and this gives the craftsman ample opportunity to exercise his originality.
PopularScience_19391201_0135_006_0205.xml
article
176
176
CRAFTWORK
[no value]
Wire Novelties
A number of new uses to which to put discarded coat hangers
[no value]
[no value]
FRANK CAPORAEL
OLD wire coat hangers provide material for many useful little devices. Several suggestions are given in the accompanying illustrations. The ornamental book ends are each bent from a single piece of wire and may be any desired size. The closet hat holders have a loop at the top and two parallel loops at the lower end to clamp over the edge of a shelf.
PopularScience_19391201_0135_006_0206.xml
article
177
177
HINTS FOR THE HANDY MAN
[no value]
Small Snowplow on Wheels Can Be Pushed Easily
[no value]
[no value]
[no value]
B. N.
SNOW can quickly be removed from sidewalks, provided the fall is not too heavy, by using a small snowplow constructed as illustrated. Three triangular blocks, slotted to receive roller-skate wheels, are screwed to the frame so it will run without dragging.
PopularScience_19391201_0135_006_0207.xml
article
177
177
HINTS FOR THE HANDY MAN
[no value]
Board Aids in Mounting a Heavy Lathe Chuck
[no value]
[no value]
[no value]
JOHN C. ZIMBECK
MUCH effort can be saved in putting on and removing a heavy lathe chuck if a hardwood board about 2" thick is notched to fit the ways and recessed on top so as to hold the chuck in line with the spindle threads. After the chuck has been set on the board, the lathe can be started and the carriage run up against the edge of the board to push it and the chuck up to the spindle as shown ABOVE.
PopularScience_19391201_0135_006_0208.xml
article
177
177
HINTS FOR THE HANDY MAN
[no value]
Cork Disks for Small Gaskets
[no value]
[no value]
[no value]
R. O. F.
CORK disks pried from bottle caps can be used to make gaskets for small fittings such as those on water hose. Cut a suitable hole and trim to fit the coupling.
PopularScience_19391201_0135_006_0209.xml
article
177
177
SHOP DATA FILE
PAINTING
FINISHING RADIATORS AND PIPES
[no value]
[no value]
[no value]
[no value]
1. Clean surface with sandpaper and steel scratch brush. Wipe with clean rags and denatured alcohol to remove all traces of oil and grease. Do not use gasoline. 2. Radiators, if new and unpainted, should receive a first coat of standard metal primer, which should be allowed to dry hard.
PopularScience_19391201_0135_006_0210.xml
article
178
178,179
FOR THE Home Workshop Santa Claus
[no value]
Gabby the Duck Moves Her Head and Bill When Pulled
EIGHT PAGES OF NOVEL CHRISTMAS-GIFT PROJECTS YOU CAN CONSTRUCT WITHOUT DIFFICULTY AND AT COMPARATIVELY LITTLE EXPENSE FOR MATERIAL
[no value]
[no value]
E. A. BOWER
GABBY is an expressive little duck who captures the interest of children because of her lifelike movements. When pulled along the floor with a string, Gabby moves her head back and forth, and at the same time opens and closes her bill. Because the mechanical action is very simple, this toy is easily constructed singly or in quantity.
PopularScience_19391201_0135_006_0211.xml
article
179
179,180
FOR THE Home Workshop Santa Claus
[no value]
Flip-Over Tray Gives Double Service
[no value]
[no value]
[no value]
LOWELL R. BROWNE
ON ONE side of the unique refreshment tray illustrated at the left are circular recesses for ten beverage glasses so they can be carried without danger of spilling. The other side of the tray is flat for holding plates of sandwiches, cakes, and tea things.
PopularScience_19391201_0135_006_0212.xml
article
180
180
FOR THE Home Workshop Santa Claus
[no value]
Soup-Bone Inlays Ornament a Playing-Card Box
[no value]
[no value]
[no value]
G. A. S.
IT IS surprising what beautiful inlay work can be done with ordinary bone. Take, for example, this attractive card or novelty box. The box itself is made from straight-grained ¾ " walnut. The splined miter and rabbet joints are easily prepared on a power saw, although a good job can be done with hand tools if necessary.
PopularScience_19391201_0135_006_0213.xml
article
181
181
FOR THE Home Workshop Santa Claus
[no value]
Mariner's Dual-Purpose Lamp and Ash Tray
[no value]
[no value]
[no value]
BRUCE MACINTOSH
THE honest aroma of tarred hemp rope emphasizes the nautical design of this lamp and ash tray. The lamp has a special joint that permits it to be used either on the table or on the wall as a “pin-up” fixture. Both pieces are made of maple. Although the drawings are practically self-explanatory, a few hints may be helpful.
PopularScience_19391201_0135_006_0214.xml
article
182
182
FOR THE Home Workshop Santa Claus
[no value]
Miniature Dough Tray Keeps Muffins Hot
[no value]
[no value]
[no value]
GEORGE A. SMITH
A FAMILIAR sight in early American kitchens was the dough tray. When reproduced in miniature size, one of these curious old boxes will serve as a table container for keeping rolls and muffins hot, or for holding cookies or tea wafers. The design shown is a scale model of a dough tray used by the writer’s grandmother and is typical of those found in the kitchens of the German families of Eastern Pennsylvania before the days of the community baker.
PopularScience_19391201_0135_006_0215.xml
article
182
182
FOR THE Home Workshop Santa Claus
[no value]
Brightly-Colored Rack Holds Spices or Crackers
[no value]
[no value]
[no value]
WALTER F. DEBOLD
THE length of this simple project determines its use. When 4" long it makes a spice rack; elongated, it becomes a cracker tray. Use 1/64" sheet iron 2¾" wide and as long as desired. Bend 90 deg. to form a V. Cut two disks 2 ½" in diameter from plywood.
PopularScience_19391201_0135_006_0216.xml
article
183
183
FOR THE Home Workshop Santa Claus
[no value]
Scottie Cigarette Box Opens When Tail Is Pressed
[no value]
[no value]
[no value]
R. O. LISSAMAN
BECAUSE of its simplicity, this novel Scottie box for trinkets or cigarettes is well suited to quantity production. The lid is raised by pressure on the tail. The body and legs are made from ¼" plywood, the tail and lid from ½" stock, and the head is cut from a dressed pine “two by two,” which actually measures about 1 ⅝ " square.
PopularScience_19391201_0135_006_0217.xml
article
183
183
FOR THE Home Workshop Santa Claus
[no value]
Pumice Stone and Enamel Form Blackboard Paint
[no value]
[no value]
[no value]
T. G. HETRICK
CHILDREN often appreciate a simple blackboard at Christmas as much as an expensive gift. When ready-mixed commercial blackboard paint cannot readily be obtained at a local paint or hardware store, a substitute can be prepared by adding a small amount of powdered pumice stone to black enamel.
PopularScience_19391201_0135_006_0218.xml
article
184
184
FOR THE Home Workshop Santa Claus
[no value]
Woodland Animals Adorn Napkin Rings
[no value]
[no value]
[no value]
EDWARD B. FOX
ANIMAL napkin rings make an immediate hit with children, and with their elders, too. One of the rings, you will notice, has a larger opening for an adult-size napkin. The drawings are half size. The construction for the three—red squirrel, rabbit, and chipmunk—is the same.
PopularScience_19391201_0135_006_0219.xml
article
184
184,185
FOR THE Home Workshop Santa Claus
[no value]
Lively Squirrels Bound Alongside a Toy Cart
[no value]
[no value]
[no value]
HAZEL F. SHOWALTER
PULLED along the floor with a string, this cart rides steadily on three small wheels while the squirrel at each side of it jumps along in a lively manner. Large eccentric wheels fastened to the squirrels, but not to the cart, cause this movement.
PopularScience_19391201_0135_006_0220.xml
article
185
185
FOR THE Home Workshop Santa Claus
[no value]
Novel Stationery Holder Hammered from Copper
[no value]
[no value]
[no value]
DICK HUTCHINSON
THE base and back panel of this decorative stationery holder is 18-gauge sheet copper, lined and hammered. The front, which is 22-gauge copper is well hammered with a planishing hammer for smoothness and to make the material springy. A ship, Scottie, or any ornamental figure may be applied to the front.
PopularScience_19391201_0135_006_0221.xml
article
186
186,187
WOODWORKING
[no value]
COPPERTRIMMED Fireplace OF MODERN DESIGN
[no value]
[no value]
[no value]
W. Stanton Hills
THIS modern fireplace can be constructed by the average craftsman without the use of power tools. Besides being an ornament, it has shelves for books, and space has also been allotted for the installation of a radio, if desired. The hearth A is a piece of five-ply veneer on which are glued and screwed blocks B, C, D, and N. B and C are ½" wider in the rear than in the front.
PopularScience_19391201_0135_006_0222.xml
article
188
188,189
MODELS
[no value]
Masts and Yards FOR OUR MODEL of the "JOE LANE"
[no value]
[no value]
[no value]
EMANUELE STIERI
BEFORE the Civil War, one of the finest and fastest cutters in the old United States Revenue Marine, forerunner of our present Coast Guard, was the Joe Lane. She is the prototype of our new ship model, illustrated on the facing page. If you have completed the hull and deck fittings as described in the first installment, you are ready to make the masts and yards as follows:
PopularScience_19391201_0135_006_0223.xml
article
190
190,191
MODELS
[no value]
Simplified Switchboard CONTROLS MODEL RAILWAY SYSTEM
[no value]
[no value]
[no value]
C. ELMER BLACK
ADAPTABLE to any size model-railway system, this switchboard groups all the controls at your finger tips so you can execute the most difficult train movement with ease. Cut the 12" by 18" panel from pressed composition wood of tempered quality or similar board, and construct a box from 13/16" stock to fit flush with the edges of the panel and 3½" deep inside.
PopularScience_19391201_0135_006_0224.xml
article
192
192
HINTS FOR THE HANDY MAN
[no value]
Flexible Rule Saves Time on Circular-Saw Work
[no value]
[no value]
[no value]
H. R. H.
IN USING a circular saw, it is desirable to have a rule instantly available. A good way to insure this is to fasten a flexible metal rule to the miter gauge of the saw. It is held with a clip soldered to the case of the rule.
PopularScience_19391201_0135_006_0225.xml
article
192
192
HINTS FOR THE HANDY MAN
[no value]
Lifting Magnet Wound on a Transformer Core
[no value]
[no value]
[no value]
R. W. WAGNER
A POWERFUL electromagnet for lifting demonstrations is easily made by utilizing the core of an audio transformer from a discarded radio set. The transformer should be the kind that has laminations shaped like the letters E and I. Take it apart and separate the laminations.
PopularScience_19391201_0135_006_0226.xml
article
192
192
SHOP DATA FILE
[no value]
CLEANING PAINTBRUSHES
[no value]
[no value]
[no value]
[no value]
1. Suspend brush in varnish remover deep enough to cover half the metal or leather ferrule. The brush should not rest on the bristle tips. Cover can with paper cone to prevent evaporation and leave until thoroughly softened. 2. Remove brush from can, lay on paper, and use the back of a table knife or a steel scratch brush to remove softened paint.
PopularScience_19391201_0135_006_0227.xml
article
193
193,194,195
Dummies Carved by Guild Member TRAVEL TO MANY FOREIGN LANDS
[no value]
Dummies Carved by Guild Member TRAVEL TO MANY FOREIGN LANDS
[no value]
[no value]
[no value]
[no value]
IN A SMALL workshop on the north side of Chicago, George Larsen, a member of the Chicago Carvers and Craftsmen’s Club, carves heads for ventriloquist dummies that amuse thousands of people throughout the world. Photographs and letters from foreign ventriloquists give an indication of how far his dummies have traveled.
PopularScience_19391201_0135_006_0228.xml
article
196
196
PHOTOGRAPHY
[no value]
Picture Data Recorded Directly on Film
[no value]
[no value]
[no value]
KENNETH MURRAY
CONTAINERS in which spools of 35-mm. film are packed have convenient spaces for the writing of information and data, but that gives no assurance that a roll of negatives will always be returned to the correct box. When it is not, whatever method of filing is used will be seriously upset.
PopularScience_19391201_0135_006_0229.xml
article
196
196
PHOTOGRAPHY
[no value]
Miniature Transparencies Printed in Camera
[no value]
[no value]
[no value]
[no value]
AMATEURS who wish to make positive transparencies from their 35-mm. negatives can do so by using their cameras as printers. To do this, place the negative and a length of 35-mm. positive film together, emulsion to emulsion. Then, with the negative facing in, wind the films into a daylight cartridge.
PopularScience_19391201_0135_006_0230.xml
article
197
197
PHOTOGRAPHY
[no value]
Lighting Unit Built into Camera Accessory Case
[no value]
[no value]
[no value]
LOUIS HOCHMAN
BESIDES holding a camera and all its accessories, this carrying case serves as a portable lighting unit. The original was made from a portable phonograph case obtained from a junk dealer, but any small sample case or suit case may be used if it has a cover as deep as the case itself and at least 3½" deep.
PopularScience_19391201_0135_006_0231.xml
article
197
197
PHOTOGRAPHY
[no value]
Alphabet-Soup Letters Spell Out Greeting
[no value]
[no value]
[no value]
J. J. MIHOK
NOVEL photographic greeting cards may be made by using table-top set-ups like the one illustrated. The message is spelled out in letters taken from a package of alphabet-soup noodles and glued on black paper. These clearly formed little letters are also useful in composing short titles for home movies.
PopularScience_19391201_0135_006_0232.xml
article
197
197
PHOTOGRAPHY
[no value]
Line Drawing Made from Print
[no value]
[no value]
[no value]
[no value]
TO CONVERT a photograph into a line drawing, trace the portions desired with waterproof India ink. Then bleach out the print in the following bath: 62 grains potassium bichromate, 90 minims sulphuric acid, and 16 ounces water. Wash the paper thoroughly.
PopularScience_19391201_0135_006_0233.xml
article
198
198
PHOTOGRAPHY
[no value]
Foolproof Set-Up for Trick Double Exposures
[no value]
[no value]
[no value]
GUY HUNTINGTON
DUAL photographs can be successfully taken by setting up a framework in front of a camera as shown in the accompanying drawing. The upper crosspiece of the framework is slotted, and the baseboard is grooved so that a mask can slide from one side to the other.
PopularScience_19391201_0135_006_0234.xml
article
198
198
PHOTOGRAPHY
[no value]
Causes of Milky Fixing Bath
[no value]
[no value]
[no value]
[no value]
WHEN a hypo fixing bath has a milky appearance, it-may be due either to an excess of free acid, which decomposes the hypo and precipitates free sulphur, or to insufficient acid. Other causes are insufficient or impure sulphite or careless mixing.
PopularScience_19391201_0135_006_0235.xml
article
198
198
SHOP DATA FILE
[no value]
DAYLIGHT EXPOSURE TABLE
[no value]
[no value]
[no value]
[no value]
Brilliant Subjects—Distant landscapes and mountains without prominent dark objects in foreground; beach, marine, and snow scenes. Bright Subjects—Scenics with objects in foreground; nearby people in beach, marine, and snow scenes.
PopularScience_19391201_0135_006_0236.xml
article
199
199
PHOTOGRAPHY
[no value]
Skillful Enlarging Corrects Distorted Building Photos
[no value]
[no value]
[no value]
C. W. RICKMAN
WHEN a camera is tilted upward at a tall building, the resulting picture appears to taper and the building looks as if it were leaning backward. Professional view cameras, to be sure, have a revolving back or lens mount that permits this distortion to be corrected, but the defect is common to all ordinary cameras such as amateurs use.
PopularScience_19391201_0135_006_0237.xml
article
199
199
SHOP DATA FILE
[no value]
INDOOR EXPOSURE GUIDE
[no value]
[no value]
[no value]
[no value]
NOTE: Each of the following diaphram stops is approximately twice as large as the preceding one: f/22, f/16, f/11, f/8, f/5.6, f/4, f/2.8, f/2 (largest). The figures above are lens apertures at 1/25 sec. Therefore, for 1/50 sec., use opening twice as large.
PopularScience_19391201_0135_006_0238.xml
article
200
200,201
HINTS FOR THE HANDY MAN
[no value]
NOVEL SPATTER-PAINTED XMAS CARDS
The design and lettering are cut like a stencil, and the color is applied by means of a toothbrush
[no value]
[no value]
[no value]
IF YOU want something novel yet inexpensive in the way of Christmas cards this year, try spatter-painting them yourself with an old toothbrush. The more you spatter on the color, the prettier they will be. The effects are somewhat like linoleum-block work except that the colors are not solid, but broken up into interesting and variegated spatter patterns.
PopularScience_19391201_0135_006_0239.xml
article
202
202,203,204,205,246
HOME LABORATORY
[no value]
Chemical Analysis for Amateurs
[no value]
[no value]
[no value]
RAYMOND B. WAILES
MINERAL oil had been substituted in part for butter fat,” U. S. health officials reported, when they recently had 664 tubs of butter seized and condemned. While not common, such instances do occur, and Federal agencies are vigilant to detect them.
PopularScience_19391201_0135_006_0240.xml
article
205
205
HOME LABORATORY
[no value]
Homemade Solution for Treating Burns
[no value]
[no value]
[no value]
[no value]
"SAFETY FIRST” in your home laboratory may well include a first-aid bottle of tannic acid solution for burns. To make up the preparation, dissolve one half gram of potassium chloride, one gram of calcium chloride, one gram of salicylic acid, ten and one half grams of sodium chloride, and 100 grams of tannic acid in 1,000 cubic centimeters (or thirty-four fluid ounces) of water.
PopularScience_19391201_0135_006_0241.xml
article
206
206,207,208,209,249
HOME LABORATORY
[no value]
Microscope Questions... and Answers
PROBLEMS THAT WORRY THE AVERAGE LENS ENTHUSIAST
[no value]
[no value]
MORTON C. WALLING
QUESTION-AND-ANSWER sessions are not confined to the radio. A lot of people ask questions about microscopes and the fascinating business of using them. With the thought that readers may find it helpful to know the answers to the questions I am most frequently asked, I am writing this month’s article in question-and-answer form.
PopularScience_19391201_0135_006_0242.xml
article
210
210,211
HOME LABORATORY
[no value]
SEEING NATURE'S LAWS IN ACTION
[no value]
[no value]
[no value]
[no value]
WHEN the two are connected in parallel, or the usual way, a sixty-watt bulb gives about twice as much light as a thirty-watt bulb. Connect them in series, as shown above,, and the thirty-watt bulb will light up brightly, while the bulb of sixty-watt rating barely glows!
PopularScience_19391201_0135_006_0243.xml
article
212
212,213,214
RADIO
[no value]
A Radio for Your Floor Lamp
[no value]
[no value]
[no value]
ARTHUR C. MILLER
DESIGNED SO that it can be attached to the standard of any floor lamp, the radio set illustrated forms a handy auxiliary receiver for living room, bedroom, or den. Mounted on a bridge lamp it provides a radio for card games; attached to a floor lamp beside your favorite chair it puts the evening’s programs at your finger tips; and fastened to a standing lamp in your bedroom it serves as a convenient bedside set.
PopularScience_19391201_0135_006_0244.xml
article
215
215
RADIO
[no value]
Trouble Shooting FOR RADIO AMATEURS
[no value]
[no value]
[no value]
[no value]
ARE you having trouble with your broadcast or shortwave receiver ? If you are, study the cures given on this page. They cover seven of the most common radio ailments affecting commercial as well as home-built circuits. In each case, the trouble can be cured easily and quickly.
PopularScience_19391201_0135_006_0245.xml
article
216
216,217
[no value]
[no value]
WHAT'S NEW IN THE WORLD OF RADIO
[no value]
[no value]
[no value]
[no value]
MOUNTED within its own microphone housing, the amplifying system that operates a new hearing aid for the deaf represents the maximum in compactness. It may be carried in the hand, or worn in a vest pocket or beneath a lapel. Although the housing is unusually small in itself, it contains, besides the microphone and a three-tube amplifier, a volume control and a tone control.
PopularScience_19391201_0135_006_0246.xml
article
218
218
AUTOMOBILES
[no value]
Useful Hints for Motorists
[no value]
[no value]
[no value]
[no value]
WHEN my new car knocked, I traced the noise to the oil line. I could even feel the pounding by touching the pipe leading to the oil-pressure gauge on the dashboard. The sound obviously was caused by the alternate stopping and releasing of the oil flow from the pump by the drilled crankshaft.
PopularScience_19391201_0135_006_0247.xml
advertisement
219
219
[no value]
[no value]
Eastman Kodak Company: Kodak Super-XX
[no value]
Eastman Kodak Company
Kodak Super-XX
[no value]
[no value]
PopularScience_19391201_0135_006_0248.xml
advertisement
220
220
[no value]
[no value]
National Carbon Company, Inc.: “PRESTONE” ANTI-FREEZE
[no value]
National Carbon Company, Inc.
“PRESTONE” ANTI-FREEZE
[no value]
[no value]
PopularScience_19391201_0135_006_0249.xml
article
221
221
AUTOMOBILES
[no value]
Windshield Wiper Drives Wigwagging Stop Signal
[no value]
[no value]
[no value]
J. H. G.
A DISCARDED or second-hand electric windshield wiper in good condition can he readily converted into the power plant for driving a wigwagging automobile stop signal that commands instant attention. Mounted on the rear of a car, it is visible day or night for a considerable distance.
PopularScience_19391201_0135_006_0250.xml
article
221
221
AUTOMOBILES
[no value]
Asphalt Paint Protects Brake Line from Acid
[no value]
[no value]
[no value]
R. P. O.
OVERFILLING of automobile batteries mounted under the hood can be the cause of hydraulic-brake failure if the battery acid runs or drips down on the hydraulic line, resulting in corrosion and leakage. If any acid has been spilled in this way in your car, the first thing to do is to take it to a good mechanic who is capable of determining the possible damage.
PopularScience_19391201_0135_006_0251.xml
advertisement
221
221
[no value]
[no value]
HARLEY-DAVIDSON MOTOR CO.
[no value]
HARLEY-DAVIDSON MOTOR CO.
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0252.xml
advertisement
222
222
[no value]
[no value]
RCA Manufacturing Company, Inc.: RCA SOUND CONTROL STUDIO
[no value]
RCA Manufacturing Company, Inc.
RCA SOUND CONTROL STUDIO
[no value]
[no value]
PopularScience_19391201_0135_006_0253.xml
article
222
222
AUTOMOBILES
[no value]
Carpet over Garage Door Wipes Snow off Car Roof
[no value]
[no value]
[no value]
O. B. N.
IT’S not very good for a car to allow it to stand all night in a garage with a couple of inches of snow on its roof that may take hours to melt. I nailed up a piece of heavy carpet along the top of my garage doorway so that it hangs down far enough to act as a brush when the car is driven in, sweeping the snow off the back.
PopularScience_19391201_0135_006_0254.xml
article
222
222
AUTOMOBILES
[no value]
Reflectors in Ground Mark Driveway Entrance
[no value]
[no value]
[no value]
R. M.
IF YOUR driveway is located at an awkward bend in the road, or on a fairly dark street, so that it is not easy to find at night, the stunt illustrated in the drawings above will be found helpful as you and your friends drive up to your house after dark.
PopularScience_19391201_0135_006_0255.xml
article
222
222
AUTOMOBILES
[no value]
Handy License Holder
[no value]
[no value]
[no value]
B. J.
A GOOD place to carry the car owner’s registration certificate is over the sun visor where it can be readily tucked into a small envelope. The envelope can be fastened securely in place by means of a few daubs of rubber cement.
PopularScience_19391201_0135_006_0256.xml
advertisement
223
223
[no value]
[no value]
LIGGETT & MYERS TOBACCO CO.: Velvet
[no value]
LIGGETT & MYERS TOBACCO CO.
Velvet
[no value]
[no value]
PopularScience_19391201_0135_006_0257.xml
advertisement
224
224
[no value]
[no value]
Advertisements
[no value]
CASEIN COMPANY OF AMERICA
CASCO FLEXIBLE CEMENT
CASEIN COMPANY OF AMERICA
CASCO POWDERED CASEIN GLUE
[no value]
[no value]
PopularScience_19391201_0135_006_0258.xml
advertisement
224
224,226
[no value]
[no value]
Advertisement: POPULAR SCIENCE MONTHLY
[no value]
[no value]
POPULAR SCIENCE MONTHLY
[no value]
[no value]
PopularScience_19391201_0135_006_0259.xml
advertisement
225
225
[no value]
[no value]
SOCONY-VACUUM OIL CO., INC.: MOBILOIL ARCTIC
[no value]
SOCONY-VACUUM OIL CO., INC.
MOBILOIL ARCTIC
[no value]
[no value]
PopularScience_19391201_0135_006_0260.xml
advertisement
226
226
[no value]
[no value]
Nicholson File Company: NEEDLE FILES
[no value]
Nicholson File Company
NEEDLE FILES
[no value]
[no value]
PopularScience_19391201_0135_006_0261.xml
advertisement
227
227
[no value]
[no value]
General Motors Corporation
[no value]
General Motors Corporation
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0262.xml
advertisement
228
228
[no value]
[no value]
Henry Disston & Sons, Inc.: Disston De Luxe
[no value]
Henry Disston & Sons, Inc.
Disston De Luxe
[no value]
[no value]
PopularScience_19391201_0135_006_0263.xml
advertisement
228
228,230
[no value]
[no value]
Advertisement: Popular Science Monthly
[no value]
[no value]
Popular Science Monthly
[no value]
[no value]
PopularScience_19391201_0135_006_0264.xml
advertisement
229
229
[no value]
[no value]
GENERAL ELECTRIC: SEALED BEAM HEADLIGHTING
[no value]
GENERAL ELECTRIC
SEALED BEAM HEADLIGHTING
[no value]
[no value]
PopularScience_19391201_0135_006_0265.xml
advertisement
230
230
[no value]
[no value]
THE CARBORUNDUM COMPANY
[no value]
THE CARBORUNDUM COMPANY
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0266.xml
advertisement
231
231
[no value]
[no value]
Delco-Remy: Delco battery
[no value]
Delco-Remy
Delco battery
[no value]
[no value]
PopularScience_19391201_0135_006_0267.xml
advertisement
232
232
[no value]
[no value]
ALLIED Radio Corporation
[no value]
ALLIED Radio Corporation
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0268.xml
advertisement
232
232
[no value]
[no value]
Advertisement: Popular Science Monthly
[no value]
[no value]
Popular Science Monthly
[no value]
[no value]
PopularScience_19391201_0135_006_0269.xml
advertisement
233
233
[no value]
[no value]
North Bros. Mfg. Co.: “Yankee” Handyman Screw Driver
[no value]
North Bros. Mfg. Co.
“Yankee” Handyman Screw Driver
[no value]
[no value]
PopularScience_19391201_0135_006_0270.xml
advertisement
234
234
[no value]
[no value]
Advertisement: Zerone
[no value]
[no value]
Zerone
[no value]
[no value]
PopularScience_19391201_0135_006_0271.xml
article
234
234
NEW SHOP IDEAS
[no value]
Old Bill Says
[no value]
[no value]
[no value]
[no value]
A GOOD way to clean a T-slot is to cut a piece of felt so that it is a snug fit in the bottom section of the slot and leave on a tongue that can be pulled along with pliers. New V-belts intended for multiple operation must necessarily be matched for equal drive or the set has no beneficial properties.
PopularScience_19391201_0135_006_0272.xml
advertisement
235
235
[no value]
[no value]
Advertisements
[no value]
Delta Manufacturing Company
DELTA SHAPER
Delta Manufacturing Company
DELTA GRINDER AND BUFFING HEAD
[no value]
[no value]
PopularScience_19391201_0135_006_0273.xml
advertisement
236
236
[no value]
[no value]
DURO METAL PRODUCTS COMPANY: DURO STREAMLINE HAND GRINDER
[no value]
DURO METAL PRODUCTS COMPANY
DURO STREAMLINE HAND GRINDER
[no value]
[no value]
PopularScience_19391201_0135_006_0274.xml
advertisement
236
236
[no value]
[no value]
A. J. FISHER
[no value]
A. J. FISHER
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0275.xml
advertisement
236
236
[no value]
[no value]
ALBERT CONSTANTINE AND SON, INC.
[no value]
ALBERT CONSTANTINE AND SON, INC.
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0276.xml
advertisement
236
236
[no value]
[no value]
Junior Motors Corp.: Brown JUNIOR MOTORS
[no value]
Junior Motors Corp.
Brown JUNIOR MOTORS
[no value]
[no value]
PopularScience_19391201_0135_006_0277.xml
advertisement
237
237
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0278.xml
advertisement
238
238
[no value]
[no value]
L C SMITH & CORONA TYPEWRITERS INC: CORONA
[no value]
L C SMITH & CORONA TYPEWRITERS INC
CORONA
[no value]
[no value]
PopularScience_19391201_0135_006_0279.xml
advertisement
238
238
[no value]
[no value]
CHICAGO GEAR WORKS
[no value]
CHICAGO GEAR WORKS
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0280.xml
advertisement
238
238
[no value]
[no value]
DREMEL MFG. CO.
[no value]
DREMEL MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0281.xml
article
238
238
[no value]
[no value]
Device Tests Green Peas
[no value]
[no value]
[no value]
[no value]
GAUGING the tenderness of green peas before they are canned is the purpose of the “tenderometer,” an instrument developed for use in the canning industry. Measuring maturity by the force required to shear a sample of raw shelled peas between two interlocking grids, it is expected to prove valuable in purchasing peas for canning.
PopularScience_19391201_0135_006_0282.xml
advertisement
239
239
[no value]
[no value]
National Carbon Co., Inc.: “PRESTONE” ANTI-FREEZE
[no value]
National Carbon Co., Inc.
“PRESTONE” ANTI-FREEZE
[no value]
[no value]
PopularScience_19391201_0135_006_0283.xml
advertisement
240
240
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0284.xml
advertisement
241
241
[no value]
[no value]
The Porter Chemical Company: CHEMCRAFT CHEMICAL OUTFITS
[no value]
The Porter Chemical Company
CHEMCRAFT CHEMICAL OUTFITS
[no value]
[no value]
PopularScience_19391201_0135_006_0285.xml
advertisement
242
242
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0286.xml
advertisement
243
243
[no value]
[no value]
Advertisements
[no value]
Megow's
SHIP MODELS
Megow's
HO-GAUGE FREIGHT CAR KITS
[no value]
[no value]
PopularScience_19391201_0135_006_0287.xml
advertisement
244
244
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0288.xml
advertisement
245
245
[no value]
[no value]
Walker-Turner Co., Inc.: Tilting Arbor Saw
[no value]
Walker-Turner Co., Inc.
Tilting Arbor Saw
[no value]
[no value]
PopularScience_19391201_0135_006_0289.xml
advertisement
245
245
[no value]
[no value]
Cleveland Boat Blueprint Co.: BOAT BLUEPRINTS & PATTERNS
[no value]
Cleveland Boat Blueprint Co.
BOAT BLUEPRINTS & PATTERNS
[no value]
[no value]
PopularScience_19391201_0135_006_0290.xml
advertisement
246
246
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0291.xml
advertisement
247
247
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0292.xml
advertisement
248
248
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0293.xml
advertisement
249
249
[no value]
[no value]
BAUSCH & LOMB
[no value]
BAUSCH & LOMB
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0294.xml
advertisement
249
249
[no value]
[no value]
Secre-taire MANUFACTURING COMPANY
[no value]
Secre-taire MANUFACTURING COMPANY
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0295.xml
advertisement
249
249
[no value]
[no value]
CHICAGO WHEEL & MFG. CO.
[no value]
CHICAGO WHEEL & MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0296.xml
advertisement
250
250
[no value]
[no value]
The Hygienic Products Company: Sani-Flush
[no value]
The Hygienic Products Company
Sani-Flush
[no value]
[no value]
PopularScience_19391201_0135_006_0297.xml
advertisement
250
250
[no value]
[no value]
United Co.
[no value]
United Co.
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0298.xml
advertisement
250
250
[no value]
[no value]
RECLAIMO MFG. COMPANY
[no value]
RECLAIMO MFG. COMPANY
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0299.xml
article
250
250
NEW SHOP IDEAS
[no value]
Vacuum Cups Hold Bottom of Shower-Bath Curtain
[no value]
[no value]
[no value]
J. M.
LIGHTWEIGHT shower-bath curtains have an annoying tendency to blow in and even wrap themselves around the body of the bather. This can be prevented by fastening the curtain with vacuum cups to the tub at at least three places along the bottom, as illustrated.
PopularScience_19391201_0135_006_0300.xml
article
250
250
NEW SHOP IDEAS
[no value]
Draftless Window Ventilator for Cold, Stormy Weather
[no value]
[no value]
[no value]
H. T.
ONE of the simplest ways to provide ventilation in stormy weather is to make a hinged filler strip of wood about 4" wide to fit under the lower sash. If the window is one which must be kept securely locked, a strip of wood may be placed vertically above the lower sash at either side, or a suitable bolt or catch can be installed.
PopularScience_19391201_0135_006_0301.xml
advertisement
251
251
[no value]
[no value]
ATLAS PRESS CO.: Atlas F-Series 10" Lathes
[no value]
ATLAS PRESS CO.
Atlas F-Series 10" Lathes
[no value]
[no value]
PopularScience_19391201_0135_006_0302.xml
advertisement
252
252
[no value]
[no value]
International Research Corp.: Argus Jig-A-Mat
[no value]
International Research Corp.
Argus Jig-A-Mat
[no value]
[no value]
PopularScience_19391201_0135_006_0303.xml
article
252
252
PHOTOGRAPHY
[no value]
How to Develop Cut Film in a Roll-Film Tank
[no value]
[no value]
[no value]
H. R.
MOST users of adjustable spiral-groove roll-film developing reels are not aware of the fact that these reels can also be effectively used for the development of cut films. The only alteration required—and in some instances even this may not be necessary— is to provide a greater range of adjustment for the reel so that the reel ends can he spaced the right distance apart to accommodate the cut film.
PopularScience_19391201_0135_006_0304.xml
article
252
252
PHOTOGRAPHY
[no value]
Avoiding Shutter Vibration in Time Exposures
[no value]
[no value]
[no value]
C. W. R.
WHEN a time exposure is made and the camera is not rigidly mounted, there is danger that the picture will be slightly blurred because of the vibration of opening and closing the shutter. This can be avoided by holding a piece of dull black card over the lens, but not quite touching it.
PopularScience_19391201_0135_006_0305.xml
advertisement
253
253
[no value]
[no value]
Advertisements
[no value]
Universal Camera Corp.
UNIVEX MOVIE CAMERA
Universal Camera Corp.
UNIVEX PROJECTOR
[no value]
[no value]
PopularScience_19391201_0135_006_0306.xml
advertisement
253
253
[no value]
[no value]
WILLOUGHBYS: VOIGTLANDER BRILLIANT V6
[no value]
WILLOUGHBYS
VOIGTLANDER BRILLIANT V6
[no value]
[no value]
PopularScience_19391201_0135_006_0307.xml
advertisement
253
253
[no value]
[no value]
General Electric Co.: G-E Meter
[no value]
General Electric Co.
G-E Meter
[no value]
[no value]
PopularScience_19391201_0135_006_0308.xml
advertisement
254
254
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0309.xml
article
255
255
PHOTOGRAPHY
[no value]
Fan Hastens the Drying of Rubber Cement
[no value]
[no value]
[no value]
C. L.
RUBBER cement is much favored for paper or photographs because it does not cause wrinkles and the excess can easily be rubbed off. For best results, it must be applied to both surfaces and allowed to dry before the parts are pressed together.
PopularScience_19391201_0135_006_0310.xml
article
255
255
PHOTOGRAPHY
[no value]
Monohydrated Chemicals for Photographic Use
[no value]
[no value]
[no value]
[no value]
WHEN perfectly dry or in the so-called anhydrous or desiccated form, some photo chemicals, such as sodium carbonate, absorb moisture from the air and change in strength. They are therefore also sold in a form known as “monohydrated”—that is, with sufficient moisture added to make them stable.
PopularScience_19391201_0135_006_0311.xml
article
255
255
PHOTOGRAPHY
[no value]
Photos Used to Decorate Glass Switch Plates
[no value]
[no value]
[no value]
GEORGE H. HORST
A NOVEL way to ornament glass switch plates on the wall is to back them up with photographs. Glass switch plates ordinarily come with a mirror backing, but the silver can be removed with a razor blade without scratching the glass if a little care is taken.
PopularScience_19391201_0135_006_0312.xml
advertisement
255
255
[no value]
[no value]
Advertisements
[no value]
FOLMER GRAFLEX CORPORATION
National GRAFLEX
FOLMER GRAFLEX CORPORATION
Miniature SPEED GRAPHIC
[no value]
[no value]
PopularScience_19391201_0135_006_0313.xml
advertisement
256
256
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0314.xml
article
257
257
NEW SHOP IDEAS
[no value]
A Removable Bit Holder for the Drill Press
[no value]
[no value]
[no value]
L. J. S.
ALTHOUGH this bit-holding ring resembles the ordinary one found on many drill presses, it has the advantage of being easily removed when it is necessary to utilize the maximum capacity of the table or to adjust the table close to the chuck. The holder is cut from a glued-up block consisting of two pieces of five-ply wood.
PopularScience_19391201_0135_006_0315.xml
article
257
257
NEW SHOP IDEAS
[no value]
Repairing Furniture Leg Split at the Caster
[no value]
[no value]
[no value]
C. F. BLAKE
FREQUENTLY a piece is split off a chair or table leg by the caster shank. When this occurs, a permanent repair may be made as follows: First, glue and brad the piece back into place and allow time for the glue to set firmly. Scrape off any excess glue which may ooze out.
PopularScience_19391201_0135_006_0316.xml
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257
257
[no value]
[no value]
GILBERT BRASS FOUNDRY CO.
[no value]
GILBERT BRASS FOUNDRY CO.
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0317.xml
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257
257
[no value]
[no value]
KEUFFEL & ESSER CO.: WYTEFACE STEEL MEASURING TAPES
[no value]
KEUFFEL & ESSER CO.
WYTEFACE STEEL MEASURING TAPES
[no value]
[no value]
PopularScience_19391201_0135_006_0318.xml
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258
258
[no value]
[no value]
Advertisement: POPULAR SCIENCE MONTHLY
[no value]
[no value]
POPULAR SCIENCE MONTHLY
[no value]
[no value]
PopularScience_19391201_0135_006_0319.xml
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259
259
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0320.xml
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260
260
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0321.xml
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261
261
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0322.xml
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262
262
[no value]
[no value]
SOUTH BEND LATHE WORKS
[no value]
SOUTH BEND LATHE WORKS
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0323.xml
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263
263
[no value]
[no value]
SPORS COMPANY
[no value]
SPORS COMPANY
[no value]
[no value]
[no value]
PopularScience_19391201_0135_006_0324.xml
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264
264,265,266
[no value]
[no value]
LIGGETT & MYERS TOBACCO CO.: CHESTERFIELDS
[no value]
LIGGETT & MYERS TOBACCO CO.
CHESTERFIELDS
[no value]
[no value]
PopularScience_19391201_0135_006_0325.xml